Country name 1980 1981 1982 1983
San Marino 12 10 9 9
Israel 12 12 12 12
Finland 16 14 14 15
Luxembourg 14 14 14 14
Austria 16 15 14 13
Qatar 14 15 14 14
Virgin Islands (U.S.) 14
Italy 16 16 16 15
Brunei Darussalam 18 18 16 16
Cuba 18 17 17 16
American Samoa 17
Lebanon 18 17
Bermuda 23 19 18 18
Portugal 18 18 18 18
St. Vincent and the Grenadines 18
Belgium 19 18 18
Kuwait 19 19 18 19
Samoa 20 21 18 18
United Kingdom 19 19 18
French Polynesia 21 19 19 22
Bahrain 20 19 19 18
Latvia 20 20 20
Guam 20 20 20 20
New Caledonia 21 20 20
Argentina 20 20 20
Malta 21 21 21 20
France 20 21
Mauritius 20 20 21 21
New Zealand 17 21
Cyprus 23 22 21 21
Tonga 24 25 21 20
United Arab Emirates 16 16 21 22
Uruguay 22 21 22 21
Guinea-Bissau 25 23 23 22
Netherlands 24 23 23 20
Trinidad and Tobago 26 24 23 23
Grenada 32 23 23 23
Greece 25 24 23 24
Oman 23 23 25 25
Japan 25 25 25 25
Solomon Islands 25 25 26 25
China 27 27 26 25
Malaysia 27 26 26 26
Paraguay 27 27 26 26
Panama 27 27 26 26
Sao Tome and Principe 29 28 27 26
Venezuela, RB 28 27 27 26
Iraq 28 28 27 24
Suriname 23 27 27 25
Iran, Islamic Rep. 27 20
Turkey 27 28 29
Syrian Arab Republic 29 28 28 27
Singapore 31 30 28 29
Spain 28 28 27
Ireland 29 29 28 28
Bahamas, The 26 26 28 21
Czech Republic 29 29 29
Ghana 28 30 30 29
Lao PDR 31 30 30 29
Colombia 31 31 30 30
Hong Kong SAR, China 30 30 30 28
Kiribati 30 30 31 30
St. Lucia 32 31 31 32
Papua New Guinea 30 31
Philippines 32 32 31 32
Jordan 32 32 31 32
Angola 31 37
Indonesia 32 32 29
Costa Rica 28 33 32 32
Guinea 38 36 32 31
Botswana 32 32 32 31
Sudan 34 34 33 34
Swaziland 34 33 33 33
Algeria 36 35 34 32
Egypt, Arab Rep. 33 34 31
Sierra Leone 34 33 35 34
Guatemala 34 37 35 36
Ecuador 36 36 35 36
Bhutan 36 35
Pakistan 37 36 36 35
Nicaragua 35 36 35
Morocco 38 38 36 36
Uganda 34 35 36 35
Cote d'Ivoire 39 39 36 36
Guyana 33 33 37 36
Nigeria 36 35 37 37
Mexico 39 37 37
Honduras 37 39 37 37
Tunisia 39 39 38 38
Peru 37 37 38 35
Benin 55 48 39 38
Burundi 35 37 39 47
Tanzania 43 40 40
Mali 42 42 40 37
Madagascar 46 44 41 39
Djibouti 42 40 41 48
Zimbabwe 44 45 42 39
Niger 39 41 42 40
Senegal 43 46 43 44
Mauritania 46 41 44 45
Haiti 43 44 44 43
Gabon 43 45 45 44
Korea, Rep. 48 48 46 44
Nepal 38 48 46 43
Zambia 49 48 48 47
Cambodia 44 48 46
Rwanda 56 52 50 47
Cameroon 52 52 51 49
Togo 54 55 52 48
Lesotho 48 48 52 51
Myanmar 48 52 56 55
Congo, Rep. 56 54 58 58
Burkina Faso 53 54 60 60
Central African Republic 61 60 61 62
Ethiopia 59 64 63 59
Equatorial Guinea 69 68
Mozambique 81 69 56
Croatia
Serbia
Maldives
Barbados 20
Dominica
South Sudan
Dominican Republic 46
Turkmenistan
Marshall Islands
Hungary
Macao SAR, China
Malawi
Jamaica 41 41 34
Australia 19
Antigua and Barbuda
Tajikistan
Micronesia, Fed. Sts.
Ukraine
Moldova 29
Liberia
Monaco
Saudi Arabia
Mongolia 32 32 32
Eritrea
Montenegro
Somalia 31
Isle of Man
Sri Lanka
Kazakhstan
Brazil
Azerbaijan
Switzerland
Namibia
Macedonia, FYR
Afghanistan
Tuvalu
Lithuania 25
Belarus
Congo, Dem. Rep.
Vanuatu 24 21 24
Comoros 46 38
Denmark
El Salvador
Cabo Verde 42 40
Aruba
Kosovo
Sint Maarten (Dutch part)
Seychelles
Slovenia
Korea, Dem. Rep.
Northern Mariana Islands
Slovak Republic
Norway
Libya 20 18 17
Chile
South Africa
India
Bulgaria
Palau
St. Kitts and Nevis 25
Chad
St. Martin (French part)
Faeroe Islands
Estonia
Thailand 21
Liechtenstein
Sweden
Bolivia
Bosnia and Herzegovina
Armenia
Greenland
Cayman Islands 19
Timor-Leste
Iceland
Canada 16
Fiji 24
Poland
Germany
Vietnam 36 39
Turks and Caicos Islands
West Bank and Gaza
Georgia 19
Curacao
Belize
Kenya
United States
Russian Federation 28
Uzbekistan 24
Kyrgyz Republic 28
Bangladesh 54 55 51
Puerto Rico
Albania
Andorra 10
Yemen, Rep.
Romania 26
Gambia, The 27 24 23

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