Pertussis - number of reported cases, per unit of GDP in Chad

Chad: Pertussis - number of reported cases, per unit of GDP was 0 units per US$ of GDP in 1998. ◆ Volatile

Latest (1998)
0 units per US$ of GDP
Change on year
down 5.0%
World rank
1st
of 201 countries
All-time high
0 units per US$ of GDP
in 1976
All-time low
0 units per US$ of GDP
in 1982
Years of data
14
1974–1998

Pertussis - number of reported cases, per unit of GDP in Chad, 1974–1998

00001974198619981974: 0 units per US$ of GDP1975: 0 units per US$ of GDP1976: 0 units per US$ of GDP1977: 0 units per US$ of GDP1978: 0 units per US$ of GDP1982: 0 units per US$ of GDP1983: 0 units per US$ of GDP1984: 0 units per US$ of GDP1985: 0 units per US$ of GDP1986: 0 units per US$ of GDP1995: 0 units per US$ of GDP1996: 0 units per US$ of GDP1997: 0 units per US$ of GDP1998: 0 units per US$ of GDP

Source: Statizoid (derived). Measured in units per US$ of GDP.

Analysis

Chad recorded 0 units per US$ of GDP for pertussis - number of reported cases, per unit of gdp in 1998.

That represents a change of down 5.0% on the previous year and up 56.7% over ten years.

Over the whole period, pertussis - number of reported cases, per unit of gdp in Chad peaked at 0 units per US$ of GDP in 1976 and was at its lowest, 0 units per US$ of GDP, in 1982.

That places Chad 1st out of 201 countries with data for 1998, putting it in the top 10%.

The series is highly variable year to year, so single readings are best treated with caution.

Pertussis - number of reported cases, per unit of GDP in Chad, year by year

Annual values for Pertussis - number of reported cases, per unit of GDP in Chad, 1974 to 1998.
Year units per US$ of GDP Change
1974 0 units per US$ of GDP
1975 0 units per US$ of GDP +14.2%
1976 0 units per US$ of GDP +44.0%
1977 0 units per US$ of GDP -54.2%
1978 0 units per US$ of GDP -66.5%
1982 0 units per US$ of GDP -84.6%
1983 0 units per US$ of GDP +740.1%
1984 0 units per US$ of GDP +0.2%
1985 0 units per US$ of GDP -47.4%
1986 0 units per US$ of GDP +48.9%
1995 0 units per US$ of GDP +84.2%
1996 0 units per US$ of GDP -21.6%
1997 0 units per US$ of GDP +14.3%
1998 0 units per US$ of GDP -5.0%

Chad compared with similar countries

  • Chad's 0 units per US$ of GDP is above the median for low income countries, which is 0 units per US$ of GDP, 6670.7× the median. (23 countries reporting)

Biggest year-on-year movements

Years where Pertussis - number of reported cases, per unit of GDP in Chad 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.

YearChange FromTo
1983 +740.1% 0 units per US$ of GDP 0 units per US$ of GDP

Averages by decade

DecadeAverage LowestHighest Years
1970s 0 units per US$ of GDP 0 units per US$ of GDP 0 units per US$ of GDP 5
1980s 0 units per US$ of GDP 0 units per US$ of GDP 0 units per US$ of GDP 5
1990s 0 units per US$ of GDP 0 units per US$ of GDP 0 units per US$ of GDP 4

Countries ranked near Chad

  1. 2 Vanuatu 0 units per US$ of GDP compare
  2. 3 Samoa 0 units per US$ of GDP compare
  3. 4 French Polynesia 0 units per US$ of GDP compare

See the full ranking of 202 places →

More health data for Chad

All data for Chad →

Frequently asked questions

What is pertussis - number of reported cases, per unit of gdp in Chad?
Pertussis - number of reported cases, per unit of gdp in Chad was 0 units per US$ of GDP in 1998, according to Statizoid (derived).
What is the highest pertussis - number of reported cases, per unit of gdp recorded in Chad?
The highest recorded value was 0 units per US$ of GDP in 1976.
What is the lowest pertussis - number of reported cases, per unit of gdp recorded in Chad?
The lowest recorded value was 0 units per US$ of GDP in 1982.
How does Chad rank for pertussis - number of reported cases, per unit of gdp?
Chad ranks 1st out of 201 countries with data for 1998.
Is pertussis - number of reported cases, per unit of gdp rising or falling in Chad?
Over the last ten years it is up 56.7%. The long-run trend across the full record is volatile.
Where does this Chad data come from?
The figures come from Statizoid (derived), published as part of Pertussis - number of reported cases, per unit of GDP. Statizoid updates them automatically from the source API.

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Pertussis - number of reported cases, per unit of GDP in Chad. Statizoid, drawing on Statizoid (derived). Retrieved 16 September 2026, from https://health.statizoid.com/stat/pertussis-number-of-reported-cases-per-unit-of-gdp/chad/

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How this figure is calculated

Pertussis - number of reported cases divided by GDP (current US$), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.

Pertussis - number of reported cases ÷ GDP (current US$)

Computed from

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

Indicator
Pertussis - number of reported cases, per unit of GDP
Unit
units per US$ of GDP
Source
Statizoid (derived)
Licence
Derived by Statizoid from the sources named on the page
Coverage
202 places, 7,998 data points, 1974–2025
Last refreshed

Pertussis - number of reported cases divided by GDP (current US$), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.