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

44 years are reported by both, from 1977 to 2023.

Where does this data come from?

Statizoid (derived), published as Refugees under the mandate of the UNHCR by country or territory of asylum, per square kilometre. Statizoid refreshes it automatically from the source and publishes the full history for both places.

Sierra Leone vs Viet Nam: Refugees under the mandate of the UNHCR by country or territory of

Sierra Leone

0 units per square kilometre

in 2023

Viet Nam

0.0001 units per square kilometre

in 2023

Sierra Leone rank

167th

Viet Nam rank

164th

Refugees under the mandate of the UNHCR by country or territory of over time

Sierra Leone
Viet Nam

How they compare

Viet Nam currently reports 0.0001 units per square kilometre against 0 units per square kilometre in Sierra Leone, a difference of 0.0001 units per square kilometre.

The two have swapped places 4 times across 44 shared years of data; in 1977 it was Viet Nam ahead.

Sierra Leone ranks 167th and Viet Nam ranks 164th of 179 countries.

Across the 6 decades both report, Sierra Leone averaged higher in 4 and Viet Nam in 2.

Head to head by decade

Decade	Sierra Leone	Viet Nam	Difference	Ahead
1970s	0.0012 units per square kilometre	0.2509 units per square kilometre	0.2497 units per square kilometre	Viet Nam
1980s	0.0018 units per square kilometre	0.0756 units per square kilometre	0.0738 units per square kilometre	Viet Nam
1990s	0.3318 units per square kilometre	0.0557 units per square kilometre	0.2761 units per square kilometre	Sierra Leone
2000s	0.4435 units per square kilometre	0.0249 units per square kilometre	0.4187 units per square kilometre	Sierra Leone
2010s	0.0388 units per square kilometre	0.0009 units per square kilometre	0.0379 units per square kilometre	Sierra Leone
2020s	0.0024 units per square kilometre	0 units per square kilometre	0.0024 units per square kilometre	Sierra Leone

Averages of every year both report within each decade.

Frequently asked questions

Which has higher refugees under the mandate of the unhcr by country or territory of, Sierra Leone or Viet Nam?: Viet Nam, at 0.0001 units per square kilometre against 0 units per square kilometre in Sierra Leone as of 2023.
What is the difference in refugees under the mandate of the unhcr by country or territory of between Sierra Leone and Viet Nam?: 0.0001 units per square kilometre, with Viet Nam ahead.
How many years of comparable data are there for Sierra Leone and Viet Nam?: 44 years are reported by both, from 1977 to 2023.
How do Sierra Leone and Viet Nam rank globally for refugees under the mandate of the unhcr by country or territory of?: Sierra Leone ranks 167th and Viet Nam ranks 164th of 179 countries.
Where does this data come from?: Statizoid (derived), published as Refugees under the mandate of the UNHCR by country or territory of asylum, 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 Viet Nam: Refugees under the mandate of the UNHCR by country or territory of. Statizoid, drawing on Statizoid (derived). Retrieved 16 September 2026, from https://social-development.statizoid.com/compare/refugees-under-the-mandate-of-the-unhcr-by-country-or-territory-of-asylum-per-square/sierra-leone/viet-nam/

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<a href="https://social-development.statizoid.com/compare/refugees-under-the-mandate-of-the-unhcr-by-country-or-territory-of-asylum-per-square/sierra-leone/viet-nam/">Sierra Leone vs Viet Nam: Refugees under the mandate of the UNHCR by country or territory of</a> — Statizoid

About this data

Indicator: Refugees under the mandate of the UNHCR by country or territory of asylum, per square kilometre
Unit: units per square kilometre
Source: Statizoid (derived)
Licence: Derived by Statizoid from the sources named on the page
Coverage: 226 places, 9,772 data points, 1961–2023
Last refreshed: 19 August 2026

Refugees under the mandate of the UNHCR by country or territory of asylum 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.