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Participating Countries

Education system Cycle I Cycle II
Round 1
2012
Round 2
2014
Round 3
2017
Round 1
2023
Australia    
Austria    
Belgium (Flemish)    
Canada    
Chile    
Croatia      
Cyprus1      
Czech Republic    
Denmark    
Ecuador      
Estonia    
Finland    
France    
Germany    
Greece      
Hungary    
Indonesia      
Ireland    
Israel    
Italy    
Japan    
Kazakhstan      
Korea, Republic of    
Latvia      
Lithuania    
Mexico      
Netherlands    
New Zealand    
Norway    
Peru      
Poland    
Portugal      
Russian Federation    
Singapore    
Slovak Republic    
Slovenia      
Spain    
Sweden    
Switzerland      
Turkey      
United Kingdom (England)    
United Kingdom (Northern Ireland)      
United States See note2 3
    Total Round 1
25
Round 2
9
Round 3
6
Round 1
33
Cycle I
394
Cycle II
33

● = Indicates participation in particular assessment with results reported or forthcoming.

○ = Indicates participation in particular assessment but results either not reported or reported separately, typically due to sampling problems, response rate problems, or other procedural problems with the data.

1 The Republic of Cyprus is recognized by all members of the United Nations except Turkey. Until a lasting and equitable solution is found within the context of the United Nations, Turkey will maintain the same position toward Cyprus. The information in PIAAC relates to the area under the effective control of the Government of the Republic of Cyprus.

2 In 2014, the United States conducted a second round of national data collection, known as the National Supplement to the Main Study. The U.S. Round 2 data collection was not administered to a nationally representative sample; instead, it was designed to enhance and expand the U.S. Round 1 data. Thus, U.S. Round 2 data are reported only as part of the combined 2012/2014 U.S. PIAAC dataset.

3 In 2017, the United States conducted a third round of national data collection with a nationally representative sample of U.S. adults, providing a comparison to the 2012/2014 data and supporting the calculation of state- and county-level estimates.

4 Overall, 39 countries participated in Cycle I of PIAAC, including 25 countries in Round 1 (2012), 9 additional countries in Round 2 (2015), and 5 more countries in Round 3 (2017). Although the United States conducted multiple data collections during Cycle I, it only counts once toward the total number of participating countries in Cycle I.

NOTE: OECD member countries are bolded. Subnational education systems are italicized.

SOURCE: Organization for Economic Cooperation and Development (OECD), Program for the International Assessment of Adult Competencies (PIAAC).


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