Country name 1980 1981 1982 1983
Afghanistan
Albania
Algeria
American Samoa
Andorra
Angola
Antigua and Barbuda
Argentina 29 29
Armenia
Aruba
Australia 31 31 30 28
Austria 39
Azerbaijan 29
Bahamas, The
Bahrain 35 34
Bangladesh
Barbados 22 24 23
Belarus
Belgium 34 33 32 31
Belize
Benin
Bermuda
Bhutan
Bolivia 21 20 17 17
Bosnia and Herzegovina
Botswana
Brazil 25 23 25
Brunei Darussalam
Bulgaria 43 43 44 44
Burkina Faso
Burundi
Cabo Verde
Cambodia
Cameroon
Canada 29 28 27 26
Cayman Islands
Central African Republic
Chad
Chile 24 24 18 18
China 18 18 18 19
Colombia 34
Comoros
Congo, Dem. Rep.
Congo, Rep.
Costa Rica 24 22 21 22
Cote d'Ivoire
Croatia
Cuba
Curacao
Cyprus 34 33 33 32
Czech Republic
Denmark 29 28
Djibouti
Dominica
Dominican Republic
Ecuador
Egypt, Arab Rep. 20 22 22 21
El Salvador 21
Equatorial Guinea 5
Eritrea
Estonia
Ethiopia
Faeroe Islands
Fiji
Finland 34 34 33 33
France 36 35 34 33
French Polynesia
Gabon
Gambia, The
Georgia
Germany
Ghana
Greece 29 29 29
Greenland
Grenada
Guam 14
Guatemala 19 19
Guinea
Guinea-Bissau
Guyana
Haiti 8 8 9 9
Honduras 17 17 17 17
Hong Kong SAR, China 50 49 47 45
Hungary 41 39 38 37
Iceland
India
Indonesia 13 15
Iran, Islamic Rep.
Iraq
Ireland 28
Isle of Man
Israel 31 31 30 30
Italy 37 37 36 36
Jamaica
Japan 35 35 35 35
Jordan 22
Kazakhstan
Kenya
Kiribati
Korea, Dem. Rep.
Korea, Rep. 29 28 28 29
Kosovo
Kuwait 27
Kyrgyz Republic
Lao PDR
Latvia
Lebanon
Lesotho
Liberia
Libya 34 40
Liechtenstein
Lithuania
Luxembourg 38 37 36 35
Macao SAR, China
Macedonia, FYR
Madagascar
Malawi
Malaysia 24 25 24 26
Maldives
Mali
Malta
Marshall Islands
Mauritania
Mauritius
Mexico
Micronesia, Fed. Sts.
Moldova 26 26 26
Monaco
Mongolia
Montenegro
Morocco
Mozambique
Myanmar 10 10 10 10
Namibia
Nepal
Netherlands 31 28
New Caledonia
New Zealand
Nicaragua
Niger
Nigeria 6
Northern Mariana Islands
Norway 29 29 28 27
Oman
Pakistan 20 20 20 20
Palau
Panama 18 18
Papua New Guinea
Paraguay 26 27
Peru
Philippines 15 14 14 14
Poland 39 38 38
Portugal 36 37 37 35
Puerto Rico 26 26 25 25
Qatar
Romania 44 44 44 44
Russian Federation
Rwanda
Samoa
San Marino 49 49 47 46
Sao Tome and Principe 23 11 15 14
Saudi Arabia
Senegal
Serbia
Seychelles
Sierra Leone
Singapore 36 37 37 36
Sint Maarten (Dutch part)
Slovak Republic
Slovenia
Solomon Islands
Somalia
South Africa
South Sudan
Spain 36 35 34 33
Sri Lanka 19
St. Kitts and Nevis 12 12 19
St. Lucia
St. Martin (French part)
St. Vincent and the Grenadines
Sudan
Suriname 14 22
Swaziland
Sweden 32 31 30 30
Switzerland 38 38 37 36
Syrian Arab Republic 29
Tajikistan
Tanzania
Thailand 10 13 14 13
Timor-Leste
Togo
Tonga
Trinidad and Tobago 37 40 39 38
Tunisia 33 34 35
Turkey 35 32
Turkmenistan
Turks and Caicos Islands
Tuvalu
Uganda
Ukraine
United Arab Emirates
United Kingdom 37 35 34 33
United States 31 30 29 28
Uruguay
Uzbekistan
Vanuatu
Venezuela, RB 28 28 28 26
Vietnam
Virgin Islands (U.S.)
West Bank and Gaza
Yemen, Rep.
Zambia
Zimbabwe

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