Measles - number of reported cases, annual growth rate in Sierra Leone
Sierra Leone: Measles - number of reported cases, annual growth rate was 60.47 % change on previous year in 2025. ◆ Volatile
Measles - number of reported cases, annual growth rate in Sierra Leone, 1977–2025
Source: Statizoid (derived). Measured in % change on previous year.
Analysis
Sierra Leone recorded 60.47 % change on previous year for measles - number of reported cases, annual growth rate in 2025.
That represents a change of up 175.6% on the previous year and up 252.5% over ten years.
Over the whole period, measles - number of reported cases, annual growth rate in Sierra Leone peaked at 900 % change on previous year in 2021 and was at its lowest, -100 % change on previous year, in 2007.
Sierra Leone ranks 33rd of 203 countries on this measure, in the top quarter.
The series is highly variable year to year, so single readings are best treated with caution.
Measles - number of reported cases, annual growth rate in Sierra Leone, year by year
| Year | % change on previous year | Change |
|---|---|---|
| 1977 | 12.66 % change on previous year | — |
| 1978 | -71.72 % change on previous year | -666.6% |
| 1980 | -11.63 % change on previous year | -83.8% |
| 1981 | -5.99 % change on previous year | -48.5% |
| 1982 | 20.36 % change on previous year | -440.2% |
| 1983 | 5.49 % change on previous year | -73.1% |
| 1984 | -7.19 % change on previous year | -231.0% |
| 1985 | -16.56 % change on previous year | +130.4% |
| 1986 | -95.11 % change on previous year | +474.4% |
| 1987 | 509.76 % change on previous year | -636.0% |
| 1988 | -79.3 % change on previous year | -115.6% |
| 1989 | 201.93 % change on previous year | -354.6% |
| 1990 | 32.8 % change on previous year | -83.8% |
| 1991 | -65.78 % change on previous year | -300.6% |
| 1992 | 221.83 % change on previous year | -437.2% |
| 1993 | 150.33 % change on previous year | -32.2% |
| 1994 | -95.02 % change on previous year | -163.2% |
| 1995 | 201.75 % change on previous year | -312.3% |
| 2001 | -81.85 % change on previous year | -140.6% |
| 2002 | -12.48 % change on previous year | -84.8% |
| 2003 | 3.17 % change on previous year | -125.4% |
| 2004 | -98.81 % change on previous year | -3217.9% |
| 2005 | 314.29 % change on previous year | -418.1% |
| 2006 | 13.79 % change on previous year | -95.6% |
| 2007 | -100 % change on previous year | -825.0% |
| 2009 | -29.55 % change on previous year | -70.5% |
| 2011 | 71.26 % change on previous year | -341.2% |
| 2012 | -63.65 % change on previous year | -189.3% |
| 2013 | -97.79 % change on previous year | +53.6% |
| 2015 | -39.66 % change on previous year | -59.4% |
| 2016 | 51.57 % change on previous year | -230.0% |
| 2017 | 103.59 % change on previous year | +100.9% |
| 2018 | -81.63 % change on previous year | -178.8% |
| 2019 | -88.37 % change on previous year | +8.3% |
| 2020 | -57.5 % change on previous year | -34.9% |
| 2021 | 900 % change on previous year | -1665.2% |
| 2022 | 330 % change on previous year | -63.3% |
| 2023 | -11.76 % change on previous year | -103.6% |
| 2024 | -80 % change on previous year | +580.0% |
| 2025 | 60.47 % change on previous year | -175.6% |
Sierra Leone compared with similar countries
- Sierra Leone's 60.47 % change on previous year is above the median for low income countries, which is 7.05 % change on previous year, 8.6× the median. (24 countries reporting)
- Sierra Leone's 60.47 % change on previous year is above the median for Sub-Saharan Africa, which is -22.77 % change on previous year. (48 countries reporting)
Biggest year-on-year movements
Years where Measles - number of reported cases, annual growth rate in Sierra Leone changed far more than this series normally does. A large move can be a real event or a change in how the figure was measured — the source note below says who published it.
| Year | Change | From | To |
|---|---|---|---|
| 2004 | -3217.9% | 3.17 % change on previous year | -98.81 % change on previous year |
| 2021 | +1665.2% | -57.5 % change on previous year | 900 % change on previous year |
Averages by decade
| Decade | Average | Lowest | Highest | Years |
|---|---|---|---|---|
| 1970s | -29.53 % change on previous year | -71.72 % change on previous year | 12.66 % change on previous year | 2 |
| 1980s | 52.18 % change on previous year | -95.11 % change on previous year | 509.76 % change on previous year | 10 |
| 1990s | 74.32 % change on previous year | -95.02 % change on previous year | 221.83 % change on previous year | 6 |
| 2000s | 1.07 % change on previous year | -100 % change on previous year | 314.29 % change on previous year | 8 |
| 2010s | -18.09 % change on previous year | -97.79 % change on previous year | 103.59 % change on previous year | 8 |
| 2020s | 190.2 % change on previous year | -80 % change on previous year | 900 % change on previous year | 6 |
Countries ranked near Sierra Leone
- 30 Spain 75.33 % change on previous year compare
- 31 Morocco 70 % change on previous year compare
- 32 Gambia 62.5 % change on previous year compare
- 34 South Korea 59.18 % change on previous year compare
- 35 Georgia 50.29 % change on previous year compare
- 36 Vietnam 47.28 % change on previous year compare
More health data for Sierra Leone
- Un projection of annual infant deaths, annual growth rate -2.34 % change on previous year (2100)
- Heat deaths vs projected death rates, annual growth rate 0.773 % change on previous year (2090)
- Estimated changes in temperature-related death rates compared to projected death rates 1,199 deaths per 1,000 people (2090)
- Number of infants who die before age 1 4,209 deaths (2100)
- Neonatal tetanus - number of reported cases, gaps filled 38 (2025)
- Population ages 00-04, female, annual growth rate 0.6447 % change on previous year (2025)
- Population ages 00-04, female, per unit of GDP 0.0001 units per US$ of GDP (2025)
- Population ages 00-04, female, per capita 0.0663 units per person (2025)
- Population ages 00-04, male, annual growth rate 0.6611 % change on previous year (2025)
- Population ages 00-04, male, per unit of GDP 0.0001 units per US$ of GDP (2025)
Frequently asked questions
- What is measles - number of reported cases, annual growth rate in Sierra Leone?
- Measles - number of reported cases, annual growth rate in Sierra Leone was 60.47 % change on previous year in 2025, according to Statizoid (derived).
- What is the highest measles - number of reported cases, annual growth rate recorded in Sierra Leone?
- The highest recorded value was 900 % change on previous year in 2021.
- What is the lowest measles - number of reported cases, annual growth rate recorded in Sierra Leone?
- The lowest recorded value was -100 % change on previous year in 2007.
- How does Sierra Leone rank for measles - number of reported cases, annual growth rate?
- Sierra Leone ranks 33rd out of 203 countries with data for 2025.
- Is measles - number of reported cases, annual growth rate rising or falling in Sierra Leone?
- Over the last ten years it is up 252.5%. The long-run trend across the full record is volatile.
- Where does this Sierra Leone data come from?
- The figures come from Statizoid (derived), published as part of Measles - number of reported cases, annual growth rate. Statizoid updates them automatically from the source API.
Download this data
CSV · JSON — 40 observations, free to reuse under Derived by Statizoid from the sources named on the page.
How this figure is calculated
The year-on-year percentage change in Measles - number of reported cases. Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.
Computed from
- Measles - number of reported cases World Health Organization, Global Health Observatory
Statizoid computes this series; the underlying measurements belong to the publishers named above. The arithmetic is applied to every country and year where both inputs report, and nothing is estimated unless the page says so.
About this data
The year-on-year percentage change in Measles - number of reported cases. Computed from consecutive annual observations; years either side of a gap are skipped rather than bridged.