How many years of comparable data are there for Guinea-Bissau and Somalia?

17 years are reported by both, from 1983 to 2020.

Where does this data come from?

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

Guinea-Bissau vs Somalia: Pertussis - number of reported cases, per square kilometre

Guinea-Bissau

0 units per square kilometre

in 2023

Somalia

0 units per square kilometre

in 2020

Guinea-Bissau rank

132nd

Somalia rank

132nd

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

Guinea-Bissau
Somalia

How they compare

Guinea-Bissau currently reports 0 units per square kilometre against 0 units per square kilometre in Somalia, a difference of 0 units per square kilometre.

The two have swapped places 3 times across 17 shared years of data; in 1983 it was Guinea-Bissau ahead.

Guinea-Bissau ranks 132nd and Somalia ranks 132nd of 204 countries.

Across the 5 decades both report, Guinea-Bissau averaged higher in 2 and Somalia in 2.

Head to head by decade

Decade	Guinea-Bissau	Somalia	Difference	Ahead
1980s	0.0325 units per square kilometre	0.0006 units per square kilometre	0.0319 units per square kilometre	Guinea-Bissau
1990s	0.0007 units per square kilometre	0 units per square kilometre	0.0007 units per square kilometre	Guinea-Bissau
2000s	0 units per square kilometre	0.0017 units per square kilometre	0.0017 units per square kilometre	Somalia
2010s	0 units per square kilometre	0.0023 units per square kilometre	0.0022 units per square kilometre	Somalia
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 pertussis - number of reported cases, per square kilometre, Guinea-Bissau or Somalia?: Guinea-Bissau, at 0 units per square kilometre against 0 units per square kilometre in Somalia as of 2023.
What is the difference in pertussis - number of reported cases, per square kilometre between Guinea-Bissau and Somalia?: 0 units per square kilometre, with Guinea-Bissau ahead.
How many years of comparable data are there for Guinea-Bissau and Somalia?: 17 years are reported by both, from 1983 to 2020.
How do Guinea-Bissau and Somalia rank globally for pertussis - number of reported cases, per square kilometre?: Guinea-Bissau ranks 132nd and Somalia ranks 132nd of 204 countries.
Where does this data come from?: Statizoid (derived), published as Pertussis - 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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Guinea-Bissau vs Somalia: Pertussis - number of reported cases, per square kilometre. Statizoid, drawing on Statizoid (derived). Retrieved 11 September 2026, from https://health.statizoid.com/compare/pertussis-number-of-reported-cases-per-square-kilometre/guinea-bissau/somalia-fed-rep/

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<a href="https://health.statizoid.com/compare/pertussis-number-of-reported-cases-per-square-kilometre/guinea-bissau/somalia-fed-rep/">Guinea-Bissau vs Somalia: Pertussis - number of reported cases, per square kilometre</a> — Statizoid

About this data

Indicator: Pertussis - 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, 7,899 data points, 1974–2023
Last refreshed: 01 September 2026

Pertussis - 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.