Country name 1980 1981 1982 1983
Germany 19 18 17 17
Luxembourg 19 18 18 18
Sweden 20 19 19 19
Switzerland 20 19 19 19
Austria 20 20 19 19
Belgium 20 20 19 19
Finland 20 20 20 20
Denmark 21 20 20 19
United Kingdom 21 21 20 20
Latvia 20 21 21 21
Italy 22 22 21 21
Norway 22 22 21 21
Netherlands 23 22 21 21
Croatia 22 22 22 22
Ukraine 22 22 22 22
Estonia 22 22 22 22
France 22 22 22 22
Russian Federation 22 22 22 22
Canada 23 22 22 22
Bulgaria 22 22 22 22
United States 23 22 22 22
Hungary 22 22 22 22
Greece 23 23 22 22
Belarus 23 23 23 23
Slovenia 23 23 23 23
Japan 24 23 23 23
Lithuania 23 23 23 23
Malta 23 23 24 24
Czech Republic 24 24 24 24
Hong Kong SAR, China 25 25 24 24
Macao SAR, China 25 25 24 25
Australia 25 25 25 24
Cyprus 25 25 25 25
Poland 24 24 25 25
Portugal 26 25 25 25
Spain 26 26 25 25
Aruba 27 26 25 25
Georgia 26 26 25 25
Singapore 27 26 26 25
New Zealand 27 27 26 26
Slovak Republic 26 26 26 26
Bosnia and Herzegovina 28 27 27 26
Moldova 27 27 27 27
Romania 28 27 27 26
Uruguay 27 27 27 27
Iceland 28 27 27 27
Montenegro 28 27 27 27
Barbados 29 29 28 28
Macedonia, FYR 29 29 29 28
Curacao 31 30 29 29
Cuba 32 31 29 28
United Arab Emirates 28 29 30 31
Armenia 30 30 30 30
Ireland 30 30 30 30
Argentina 30 31 31 31
Puerto Rico 32 31 31 30
Qatar 34 33 32 30
Antigua and Barbuda 33 33 32 31
Chile 33 32 32 32
Kazakhstan 32 32 32 32
Korea, Rep. 34 33 32 32
Israel 33 33 33 33
Azerbaijan 35 34 33 33
China 35 34 33 32
Guam 34 34 34 33
Trinidad and Tobago 34 34 34 34
Bahrain 35 34 34 34
Mauritius 36 35 34 33
Korea, Dem. Rep. 36 35 34 33
Virgin Islands (U.S.) 36 35 35 35
Sri Lanka 36 36 35 35
New Caledonia 36 36 36 36
Bahamas, The 37 36 36 36
Seychelles 38 37 36 35
Costa Rica 38 37 37 36
Kyrgyz Republic 37 37 37 37
Albania 38 38 37 37
Brazil 38 38 38 37
Thailand 39 39 38 37
Suriname 40 39 38 37
Lebanon 39 39 38 38
Kuwait 40 39 38 38
French Polynesia 40 39 38 37
Brunei Darussalam 39 38 38 38
Malaysia 39 39 39 39
Jamaica 40 39 39 38
India 39 39 39 39
Grenada 40 40 39 39
Fiji 39 39 39 39
Equatorial Guinea 44 42 39 37
Turkey 40 40 40 39
Colombia 41 40 40 39
Kiribati 41 40 40 39
Gabon 39 39 40 40
Venezuela, RB 41 40 40 40
Panama 41 40 40 39
Egypt, Arab Rep. 40 40 40 40
Timor-Leste 40 40 40 40
Vietnam 41 41 40 40
Indonesia 41 41 40 40
Myanmar 41 41 41 40
Uzbekistan 41 41 41 41
Turkmenistan 41 41 41 41
Ecuador 42 41 41 41
Cambodia 41 41 41 42
Guyana 43 42 41 40
Tonga 42 41 41 41
Tunisia 42 42 41 41
South Africa 42 41 41 41
Peru 42 42 41 41
Haiti 41 41 41 42
Nepal 41 41 42 42
Dominican Republic 43 42 42 41
St. Vincent and the Grenadines 44 43 42 41
Paraguay 43 42 42 42
Guinea 42 42 42 42
Central African Republic 42 42 42 42
Bolivia 43 42 42 42
Tajikistan 43 43 43 43
Philippines 43 43 43 42
St. Lucia 44 43 43 42
Mongolia 44 43 43 43
Pakistan 43 43 43 43
Bhutan 43 43 43 43
Morocco 44 44 43 43
Saudi Arabia 44 44 44 43
Somalia 44 44 44 44
Mexico 45 44 44 43
Mali 43 44 44 44
Mozambique 44 44 44 44
Bangladesh 44 44 44 44
Sierra Leone 44 44 44 45
South Sudan 44 44 44 44
Vanuatu 44 44 44 44
Nigeria 44 44 44 45
Iran, Islamic Rep. 44 44 44 45
Lesotho 44 44 44 44
Lao PDR 44 45 45 45
Guinea-Bissau 43 44 45 46
Burundi 44 44 45 45
Congo, Dem. Rep. 45 45 45 45
Congo, Rep. 45 45 45 45
Samoa 46 45 45 44
El Salvador 45 45 45 45
Maldives 45 45 45 45
Cameroon 45 45 45 45
Mauritania 45 45 45 45
Liberia 45 45 45 45
Oman 45 45 45 45
Papua New Guinea 45 45 45 45
Benin 45 45 45 45
Comoros 45 45 45 46
Ghana 46 46 45 45
Cabo Verde 46 46 45 45
Cote d'Ivoire 45 45 45 45
Libya 46 46 45 45
Ethiopia 45 45 46 46
Guatemala 45 45 46 46
Chad 45 45 46 46
Gambia, The 45 45 46 46
Djibouti 47 46 46 45
Belize 47 46 46 45
Burkina Faso 46 46 46 46
Algeria 46 46 46 46
Madagascar 46 46 46 46
Eritrea 46 46 46 46
Tanzania 47 47 47 46
Botswana 47 47 47 47
Togo 46 46 47 47
Iraq 47 47 47 46
Angola 46 47 47 47
Honduras 47 47 47 46
Micronesia, Fed. Sts. 47 47 47 46
Sudan 47 47 47 47
Sao Tome and Principe 47 47 47 47
Zambia 47 47 47 47
Nicaragua 47 47 47 47
Senegal 47 47 47 47
Afghanistan 47 47 47 47
Namibia 47 47 47 47
Malawi 47 47 47 48
Uganda 47 47 47 47
Solomon Islands 47 47 48 48
Niger 48 48 48 48
Jordan 49 49 48 48
Rwanda 48 48 49 49
Zimbabwe 49 49 49 48
Syrian Arab Republic 49 49 49 49
Swaziland 49 49 49 49
Yemen, Rep. 49 49 50 50
Kenya 50 50 50 50
Marshall Islands
San Marino
American Samoa
Dominica
Cayman Islands
Northern Mariana Islands
Faeroe Islands
Liechtenstein
St. Martin (French part)
Bermuda
Isle of Man
Andorra
Turks and Caicos Islands
Greenland
Palau
Sint Maarten (Dutch part)
Tuvalu
Monaco
West Bank and Gaza
St. Kitts and Nevis
Kosovo
Serbia

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