Country name 1980 1981 1982 1983
Yemen, Rep. 3 3 3 4
Ethiopia 3 3 3 4
Cambodia 4 4 4 5
Uganda 4 4 4 4
Burkina Faso 4 4 4 5
Poland 4 4 4 4
Tanzania 4 5 5 5
Mozambique 5 5 5 5
Niger 5 5 5 5
Kenya 5 5 5 5
Sudan 6 6 6 7
Bangladesh 6 7 7 7
Madagascar 7 7 7 7
Kazakhstan 7 7 7 7
Vietnam 7 7 7 7
Chad 7 7 7 8
Mali 7 7 8 8
Afghanistan 7 8 8 9
China 8 8 8 8
Algeria 8 8 8 8
Myanmar 8 8 8 8
Romania 8 8 8 8
Zimbabwe 8 9 9 9
India 9 9 9 9
Germany 9 9 9 9
Somalia 9 9 10 11
Indonesia 9 9 9 9
Zambia 9 9 9 9
Nigeria 10 10 10 11
Malaysia 10 10 10 10
Thailand 10 10 10 10
Honduras 10 10 11 11
Korea, Dem. Rep. 11 11 11 11
Guatemala 11 11 10 10
Cameroon 11 11 12 12
Congo, Dem. Rep. 11 11 12 12
Switzerland 11 12 12 12
Uzbekistan 11 11 11 11
Czech Republic 11 11 11 12
Ukraine 12 12 12 12
Sweden 12 12 12 12
Bulgaria 12 12 13 13
Ghana 12 12 12 12
Haiti 12 13 13 13
Togo 13 13 13 13
Netherlands 13 13 13 13
Belarus 14 14 14 14
Philippines 14 14 14 14
Finland 14 14 14 14
Angola 15 15 15 16
Guinea 15 15 15 15
El Salvador 15 15 16 16
Pakistan 15 15 15 15
Nicaragua 16 16 16 16
Cote d'Ivoire 17 17 17 17
Belgium 17 17 17 17
Russian Federation 17 17 17 17
Senegal 17 17 18 18
Morocco 17 17 18 18
Italy 19 19 19 19
Hungary 19 19 19 19
Cuba 19 20 20 20
Austria 20 20 20 20
Dominican Republic 21 21 21 21
Turkey 21 21 22 22
Bolivia 21 21 22 22
Denmark 21 21 21 21
Libya 22 21 21 21
Spain 22 22 22 22
France 22 22 22 22
Egypt, Arab Rep. 22 22 22 22
Costa Rica 22 23 23 23
Iran, Islamic Rep. 23 23 23 24
Ecuador 24 24 25 25
Paraguay 24 24 24 24
Georgia 24 25 25 25
Congo, Rep. 25 26 26 27
New Zealand 25 25 25 25
Mongolia 25 25 25 25
United Arab Emirates 25 25 25 25
Azerbaijan 26 25 25 25
Peru 26 26 26 26
Ireland 26 26 26 26
South Africa 27 27 27 27
United Kingdom 27 27 27 27
Saudi Arabia 27 28 28 28
Iraq 29 29 29 29
Jordan 29 29 29 28
Colombia 29 29 30 30
Panama 31 31 31 32
Greece 31 31 31 31
Syrian Arab Republic 32 32 31 31
Mexico 32 32 32 32
Chile 33 34 34 34
Brazil 33 33 34 34
Armenia 34 34 34 34
Venezuela, RB 35 35 34 34
Portugal 36 36 36 36
Canada 37 37 37 37
Puerto Rico 39 41 44 46
Argentina 40 40 40 40
United States 41 41 41 41
Korea, Rep. 42 43 44 45
Japan 43 43 43 44
Israel 49 50 51 52
Uruguay 50 50 50 50
Australia 61 60 60 61
Lebanon 62 62 61 60
Kuwait 65 65 65 65
Hong Kong SAR, China 91 91 91 91
Singapore 100 98 96 96
Tunisia
Lithuania
St. Lucia
Luxembourg
West Bank and Gaza
Macao SAR, China
Macedonia, FYR
Cabo Verde
Latvia
Belize
Malawi
Djibouti
Lao PDR
South Sudan
Maldives
Suriname
Kyrgyz Republic
Timor-Leste
Malta
Tuvalu
Marshall Islands
Vanuatu
Mauritania
Liberia
Liechtenstein
Seychelles
Mauritius
Lesotho
Cyprus
Micronesia, Fed. Sts.
Sri Lanka
Moldova
St. Vincent and the Grenadines
Monaco
Central African Republic
Kosovo
Burundi
Montenegro
Tonga
Kiribati
Turkmenistan
Jamaica
Bermuda
Isle of Man
Bahrain
Namibia
Antigua and Barbuda
Nepal
American Samoa
Iceland
Dominica
New Caledonia
Serbia
Sint Maarten (Dutch part)
Sierra Leone
Slovenia
Guyana
Slovak Republic
Guinea-Bissau
Solomon Islands
Guam
Curacao
Northern Mariana Islands
Croatia
Norway
St. Kitts and Nevis
Oman
St. Martin (French part)
Grenada
Comoros
Palau
Swaziland
Greenland
Cayman Islands
Papua New Guinea
Tajikistan
Gambia, The
Brunei Darussalam
Gabon
Botswana
French Polynesia
Trinidad and Tobago
Fiji
Bosnia and Herzegovina
Faeroe Islands
Turks and Caicos Islands
Estonia
Bhutan
Qatar
Benin
Eritrea
Barbados
Equatorial Guinea
Bahamas, The
Rwanda
Aruba
Samoa
Virgin Islands (U.S.)
San Marino
Andorra
Sao Tome and Principe
Albania

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