How many years of comparable data are there for Iceland and Poland?

7 years are reported by both, from 2000 to 2018.

Where does this data come from?

UNESCO Institute for Statistics, published as Proportion of students at the end of lower secondary achieving at least a minimum proficiency level in mathematics, adjusted wealth parity index (WPIA). Statizoid refreshes it automatically from the source and publishes the full history for both places.

Iceland vs Poland: Proportion of students at the end of lower secondary achieving at

Iceland

0.764 WPIA

in 2018

Poland

0.7756 WPIA

in 2018

Iceland rank

12th

Poland rank

9th

Proportion of students at the end of lower secondary achieving at over time

Iceland
Poland

How they compare

Poland currently reports 0.7756 WPIA against 0.764 WPIA in Iceland, a difference of 0.0116 WPIA.

The two have swapped places 1 time across 7 shared years of data; in 2000 it was Iceland ahead.

Iceland ranks 12th and Poland ranks 9th of 41 countries.

Iceland has averaged higher in every one of the 2 decades both report.

Head to head by decade

Decade	Iceland	Poland	Difference	Ahead
2000s	0.8198 WPIA	0.6438 WPIA	0.176 WPIA	Iceland
2010s	0.7656 WPIA	0.7593 WPIA	0.0063 WPIA	Iceland

Averages of every year both report within each decade.

Frequently asked questions

Which has higher proportion of students at the end of lower secondary achieving at, Iceland or Poland?: Poland, at 0.7756 WPIA against 0.764 WPIA in Iceland as of 2018.
What is the difference in proportion of students at the end of lower secondary achieving at between Iceland and Poland?: 0.0116 WPIA, with Poland ahead.
How many years of comparable data are there for Iceland and Poland?: 7 years are reported by both, from 2000 to 2018.
How do Iceland and Poland rank globally for proportion of students at the end of lower secondary achieving at?: Iceland ranks 12th and Poland ranks 9th of 41 countries.
Where does this data come from?: UNESCO Institute for Statistics, published as Proportion of students at the end of lower secondary achieving at least a minimum proficiency level in mathematics, adjusted wealth parity index (WPIA). Statizoid refreshes it automatically from the source and publishes the full history for both places.

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Iceland vs Poland: Proportion of students at the end of lower secondary achieving at. Statizoid, drawing on UNESCO Institute for Statistics. Retrieved 02 September 2026, from https://reference.statizoid.com/compare/proportion-of-students-at-the-end-of-lower-secondary-achieving-at-least-a-minimum-3/iceland/poland/

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<a href="https://reference.statizoid.com/compare/proportion-of-students-at-the-end-of-lower-secondary-achieving-at-least-a-minimum-3/iceland/poland/">Iceland vs Poland: Proportion of students at the end of lower secondary achieving at</a> — Statizoid

About this data

Indicator: Proportion of students at the end of lower secondary achieving at least a minimum proficiency level in mathematics, adjusted wealth parity index (WPIA)
Unit: WPIA
Source: UNESCO Institute for Statistics
Licence: CC BY 4.0 (World Bank Open Data)
Coverage: 41 places, 266 data points, 2000–2018
Last refreshed: 21 August 2026

The Adjusted Wealth Parity Index (WPIA) is calculated by dividing the poorest quintile value for the indicator by the richest quintile value for the indicator. If the resulting value exceeds 1, the ratio is inverted and subtracted from 2. The adjusted wealth parity index is symmetrical around 1 and lies in the range 0-2. An adjusted WPI equal to 1 indicates parity between the richest and poorest quintiles. In general, a value less than 1 indicates disparity in favor of the richest quintile and a value greater than 1 indicates disparity in favor of the poorest quintile. For more information, consult the UNESCO Institute for Statistics: http://uis.unesco.org/