Country name 1981 1982 1983 1984 1985
China 3 3 3 3 3
Germany 5 5 5 5 5
India 6 5 5 5 5
Ukraine 7 7 7 7 7
Poland 7 7 7 7 7
Russian Federation 8 8 8 8 8
Italy 9 9 9 9 9
United States 9 9 9 9 9
Netherlands 10 10 10 10 10
Kazakhstan 12 12 12 12 12
Sweden 14 14 14 15 15
Slovak Republic 15 15 15 15 15
Brazil 15 15 14 14 14
Czech Republic 15 15 15 15 15
Spain 16 15 15 15 15
Nigeria 16 16 16 16 16
Saudi Arabia 16 16 16 16 16
Canada 16 16 17 17 17
Malaysia 17 18 18 19 20
United Kingdom 17 17 18 18 18
Belgium 18 18 18 18 18
Romania 18 18 18 17 17
Indonesia 18 18 17 17 16
Algeria 18 18 17 16 15
Yemen, Rep. 19 20 20 21 22
Korea, Dem. People’s Rep. 19 19 20 20 20
South Sudan 19 19 19 18 17
Switzerland 20 20 20 20 20
Bulgaria 20 20 20 20 20
Finland 20 20 20 19 19
Cameroon 20 20 20 20 20
Colombia 20 20 20 20 20
Venezuela, RB 21 20 20 19 19
Bosnia and Herzegovina 21 21 21 22 22
Sri Lanka 21 21 21 21 20
France 21 21 21 21 21
Oman 22 22 23 23 24
Norway 22 22 22 22 22
Turkey 23 22 22 21 21
Zambia 23 23 23 23 23
Pakistan 23 23 23 22 22
Lithuania 24 24 24 24 23
South Africa 24 23 23 23 22
Turkmenistan 24 24 24 24 25
Belarus 24 24 24 24 24
Nepal 24 24 24 24 24
Morocco 25 25 25 24 24
Denmark 25 25 25 25 24
Ghana 26 25 25 25 24
Australia 26 26 26 26 25
Iran, Islamic Rep. 26 25 24 24 23
Vietnam 26 26 25 25 24
Bangladesh 27 27 28 28 29
Uzbekistan 28 27 27 27 26
Croatia 28 28 28 28 27
Mexico 28 28 27 27 27
Cuba 28 28 28 28 28
Libya 29 28 27 26 26
Myanmar 29 29 29 28 28
Honduras 29 29 29 29 29
Papua New Guinea 29 29 30 30 30
Congo, Dem. Rep. 30 31 32 32 33
Hungary 30 30 30 29 29
Ecuador 30 30 30 29 29
New Zealand 30 30 30 30 30
United Arab Emirates 31 31 31 32 32
Austria 31 31 31 31 31
Bolivia 31 31 30 30 30
Tanzania 31 31 31 31 31
Ethiopia 32 32 32 32 32
Japan 32 32 32 33 33
Tunisia 32 32 32 32 32
Nicaragua 32 32 32 33 33
Philippines 33 32 31 30 29
Benin 33 32 32 32 31
Syrian Arab Republic 33 32 32 31 30
Mozambique 33 31 30 28 27
Somalia 34 35 38 41 44
Kenya 34 34 34 34 34
Niger 34 35 35 35 35
Iraq 35 34 34 34 34
El Salvador 35 35 35 36 36
Bahrain 36 35 34 34 33
Madagascar 36 36 36 36 35
Namibia 36 37 37 37 37
Zimbabwe 37 35 35 35 35
Thailand 37 37 36 36 36
Mali 37 37 37 37 37
Korea, Rep. 38 37 36 36 35
Tajikistan 38 37 37 37 37
Moldova 38 38 38 38 38
Chad 38 39 39 39 39
Kyrgyz Republic 38 38 38 38 38
Egypt, Arab Rep. 39 39 39 38 38
Macedonia, FYR 39 39 39 39 38
Peru 40 40 39 39 39
Sierra Leone 40 41 41 42 42
Argentina 40 40 39 39 39
Sudan 41 41 41 41 41
Dominican Republic 41 41 41 40 40
Chile 41 42 42 42 42
Israel 43 43 44 45 45
Guatemala 43 42 42 41 41
Estonia 43 43 43 43 44
Cambodia 43 43 42 41 40
Malawi 44 44 43 43 42
Burkina Faso 44 44 44 44 44
Greece 45 44 44 44 43
Central African Republic 45 44 44 44 43
Cote d'Ivoire 45 45 45 45 45
Mauritania 46 47 48 48 49
Georgia 47 47 47 47 47
Jordan 47 45 44 43 42
Angola 47 47 46 46 46
Ireland 48 47 47 46 46
Mongolia 48 47 47 47 47
Azerbaijan 48 48 47 47 47
Senegal 48 48 48 48 48
Uganda 49 48 46 45 44
Liberia 49 50 50 52 55
Djibouti 49 51 54 58 61
Afghanistan 50 52 56 59 63
Latvia 50 50 50 50 50
Armenia 51 51 50 50 50
Jamaica 51 50 49 49 48
Costa Rica 51 51 51 51 51
Lao PDR 52 50 49 48 47
Togo 52 51 50 49 48
Congo, Rep. 52 53 54 55 55
Rwanda 53 54 54 54 54
Gabon 57 57 57 57 56
Puerto Rico 58 58 58 59 60
Paraguay 58 57 56 56 55
Uruguay 58 58 58 58 57
Portugal 59 58 57 56 55
Guinea 60 59 57 57 57
Haiti 61 62 61 60 59
Panama 62 62 62 62 62
Kuwait 67 67 66 66 66
Gambia, The 71 71 71 70 69
Eritrea 72 71 70 69 69
Qatar 73 70 66 64 62
Guinea-Bissau 75 74 72 70 69
Lebanon 84 84 80 77 75
Burundi 91 88 85 82 79
Singapore 97 95 96 97 99
Hong Kong SAR, China 99 99 99 99 99
Macao SAR, China 100 100 100 100 100
Monaco
Northern Mariana Islands
Micronesia, Fed. Sts.
Cyprus
Mauritius
Antigua and Barbuda
Marshall Islands
Fiji
Malta
Tonga
Maldives
Montenegro
St. Vincent and the Grenadines
American Samoa
Luxembourg
Suriname
Liechtenstein
Equatorial Guinea
Samoa
Timor-Leste
San Marino
Cayman Islands
Sao Tome and Principe
Tuvalu
Lesotho
Vanuatu
Kiribati
West Bank and Gaza
Serbia
Palau
Seychelles
French Polynesia
Isle of Man
Swaziland
New Caledonia
Faroe Islands
Sint Maarten (Dutch part)
Dominica
Iceland
Curacao
Slovenia
Comoros
Solomon Islands
Trinidad and Tobago
Botswana
Cabo Verde
Bermuda
Turks and Caicos Islands
Barbados
Brunei Darussalam
Guyana
Bhutan
Guam
Belize
Grenada
Bahamas, The
Greenland
Aruba
St. Kitts and Nevis
Virgin Islands (U.S.)
St. Lucia
Andorra
St. Martin (French part)
Albania

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