How many years of comparable data are there for Sierra Leone and Turkey?

13 years are reported by both, from 1980 to 2021.

Where does this data come from?

Statizoid (derived), published as Diphtheria - number of reported cases, per square kilometre. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Sierra Leone vs Turkey: Diphtheria - number of reported cases, per square kilometre

Sierra Leone

0 units per square kilometre

in 2021

Turkey

0 units per square kilometre

in 2023

Sierra Leone rank

57th

Turkey rank

57th

Diphtheria - number of reported cases, per square kilometre over time

Sierra Leone
Turkey

How they compare

Sierra Leone currently reports 0 units per square kilometre against 0 units per square kilometre in Turkey, a difference of 0 units per square kilometre.

The two have swapped places 4 times across 13 shared years of data; in 1980 it was Turkey ahead.

Sierra Leone ranks 57th and Turkey ranks 57th of 204 countries.

Across the 4 decades both report, Sierra Leone averaged higher in 1 and Turkey in 2.

Head to head by decade

Decade	Sierra Leone	Turkey	Difference	Ahead
1980s	0.0019 units per square kilometre	0.0001 units per square kilometre	0.0018 units per square kilometre	Sierra Leone
1990s	0 units per square kilometre	0 units per square kilometre	0 units per square kilometre	Turkey
2000s	0 units per square kilometre	0 units per square kilometre	0 units per square kilometre	Turkey
2020s	0 units per square kilometre	0 units per square kilometre	0 units per square kilometre	—

Averages of every year both report within each decade.

Frequently asked questions

Which has higher diphtheria - number of reported cases, per square kilometre, Sierra Leone or Turkey?: Sierra Leone, at 0 units per square kilometre against 0 units per square kilometre in Turkey as of 2021.
What is the difference in diphtheria - number of reported cases, per square kilometre between Sierra Leone and Turkey?: 0 units per square kilometre, with Sierra Leone ahead.
How many years of comparable data are there for Sierra Leone and Turkey?: 13 years are reported by both, from 1980 to 2021.
How do Sierra Leone and Turkey rank globally for diphtheria - number of reported cases, per square kilometre?: Sierra Leone ranks 57th and Turkey ranks 57th of 204 countries.
Where does this data come from?: Statizoid (derived), published as Diphtheria - number of reported cases, per square kilometre. Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Sierra Leone vs Turkey: Diphtheria - number of reported cases, per square kilometre. Statizoid, drawing on Statizoid (derived). Retrieved 10 November 2026, from https://health.statizoid.com/compare/diphtheria-number-of-reported-cases-per-square-kilometre/sierra-leone/turkiye/

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<a href="https://health.statizoid.com/compare/diphtheria-number-of-reported-cases-per-square-kilometre/sierra-leone/turkiye/">Sierra Leone vs Turkey: Diphtheria - number of reported cases, per square kilometre</a> — Statizoid

About this data

Indicator: Diphtheria - number of reported cases, per square kilometre
Unit: units per square kilometre
Source: Statizoid (derived)
Licence: Derived by Statizoid from the sources named on the page
Coverage: 205 places, 7,917 data points, 1974–2023
Last refreshed: 31 August 2026

Diphtheria - number of reported cases divided by Land area (sq. km), matched on country and year. Neither publisher issues this ratio as a series; it is computed here from both.