ACTUAL age of each of these countries, with their current form of government or founding document or constitution.
The USA and its form of government is quite old for having the same founding document
USA
1789 (U.S. Constitution)
237 years old
Netherlands
1815 (constitutional kingdom)
211 years old
Sweden
1974 (current Instrument of Government)
52 years old
Spain
1978 (current constitution)
48 years old
Monaco
1962 (current constitution)
64 years old
Switzerland
1848 (federal constitution)
178 years old
Thailand
1932 (constitutional monarchy)
94 years old
Mongolia
1992 (current constitution)
34 years old
Portugal
1976 (current constitution)
50 years old
Hungary
2011 constitution
15 years old
Poland
1997 constitution
or 29 years old
Denmark
1849 (current constitution)
177 years old
England
Constitutional evolution (no single founding date)
Old AF
Norway
1814 constitution
212 years old
Russia
1993
33 years old
France
1958 (Fifth Republic)
68 years old
Morocco
2011 constitution (monarchy much older)
15 years old
Bulgaria
1991
35 years old
China
1949 (People’s Republic of China)
77 years old
Iran
1979 (Islamic Republic)
47 years old
Japan
1947 constitution
79 years old
Ethiopia
1995
31 years old
Egypt
2014 constitution
13 years old
Age of each of these countries:
USA: 250 years
Netherlands: 445 years
Sweden: 503 years
Spain: 547 years
Monaco: 729 years
Switzerland: 735 years
Thailand: 788 years
Mongolia: 820 years
Portugal: 883 years
Hungary: 1,026 years
Poland: 1,060 years
Denmark: 1,061 years
England: 1,099 years
Norway: 1,154 years
Russia: 1,164 years
France: 1,183 years
Morocco: 1,238 years
Bulgaria: 1,345 years
China: 2,246 years
Iran: 2,575 years
Japan: 2,685 years
Ethiopia: 3,000 years
Egypt: 5,125 years