Country name 1989 1990 1991 1992 1993
China 3 3 3 3 3
India 4 4 4 5 5
Germany 6 6 6 6 6
Poland 7 7 7 7 7
Ukraine 7 7 7 7 7
Russian Federation 8 8 8 8 8
United States 9 9 8 8 8
Netherlands 9 9 9 9 9
Italy 9 9 9 9 9
South Africa 11 10 10 10 10
Malaysia 13 12 12 12 11
Kazakhstan 12 12 12 12 12
Algeria 14 13 13 13 13
Tunisia 14 14 13 13 13
Brazil 13 13 13 13 13
Indonesia 15 15 14 14 13
Nigeria 14 14 14 14 14
Sweden 15 15 15 15 15
Venezuela, RB 17 17 16 16 15
Spain 15 15 15 15 15
Czech Republic 16 16 16 16 16
Romania 17 17 17 17 17
United Kingdom 17 17 17 17 17
Belgium 17 17 18 18 18
Canada 18 18 18 18 18
San Marino 19 19 19 19 19
Iran, Islamic Rep. 20 20 20 19 19
Cameroon 20 19 19 19 19
Bermuda 20 19 19 20 19
Guatemala 23 22 21 21 20
Switzerland 20 20 21 20 20
Botswana 22 21 21 21 20
Saudi Arabia 18 19 20 20 21
Bulgaria 20 21 21 21 21
Turkey 21 20 21 21 21
Pakistan 21 21 21 21 21
Sri Lanka 21 21 21 21 21
Colombia 21 21 21 21 21
France 22 22 22 21 21
Ghana 23 22 22 22 22
Micronesia, Fed. Sts. 22 22 22 22 22
Korea, Dem. Rep. 21 21 22 22 22
Morocco 23 22 22 22 22
Brunei Darussalam 29 27 26 24 22
Albania 21 21 21 22 22
Norway 22 22 22 22 23
Finland 21 22 22 22 23
Lithuania 23 23 23 23 23
Luxembourg 25 25 24 24 23
Swaziland 23 22 23 23 23
Nepal 25 25 25 24 24
Denmark 24 24 24 24 24
Belarus 24 24 24 24 24
Mozambique 28 27 26 25 24
Mexico 25 25 25 25 24
Vietnam 26 26 25 25 24
Uzbekistan 26 25 25 25 25
Turkmenistan 25 25 25 25 25
Australia 25 25 25 25 25
Comoros 24 24 25 25 25
Syrian Arab Republic 25 26 26 26 26
Malawi 24 24 25 25 26
Zambia 24 25 25 26 26
Bosnia and Herzegovina 22 23 24 25 26
Cuba 27 27 27 27 27
Libya 27 27 27 27 27
Tanzania 28 27 27 27 27
Slovenia 27 27 27 27 27
Philippines 27 26 27 27 27
Bahrain 29 29 28 28 28
Benin 30 29 29 28 28
Bolivia 29 28 28 28 28
Myanmar 28 28 28 28 28
Croatia 27 27 29 29 28
Ecuador 28 28 28 28 28
Greenland 26 27 27 28 28
Yemen, Rep. 26 26 27 28 28
Ethiopia 30 30 29 29 28
Honduras 29 29 29 29 28
Hungary 29 29 29 29 29
Serbia 30 29 29 29
St. Lucia 33 32 32 31 30
Austria 31 30 30 30 30
Mauritius 31 30 30 30 30
New Zealand 31 31 30 30 31
Korea, Rep. 34 33 33 32 31
Jordan 38 37 34 32 31
Bangladesh 30 31 32 32 32
Oman 27 28 29 31 32
Cyprus 34 33 33 33 32
Papua New Guinea 31 31 32 32 33
Dominica 30 32 34 33 33
Iraq 34 34 33 33 33
Japan 34 34 34 34 34
United Arab Emirates 33 33 33 34 34
Tajikistan 36 35 35 34 34
Nicaragua 34 34 34 34 34
Thailand 35 35 35 35 35
Madagascar 35 35 35 35 35
Kenya 35 35 35 35 35
Zimbabwe 34 35 35 36 35
Namibia 36 36 35 35 35
Andorra 39 38 38 37 36
El Salvador 37 37 37 37 36
Argentina 37 37 37 37 36
Dominican Republic 38 38 38 37 37
Egypt, Arab Rep. 37 37 37 37 37
Niger 36 36 37 37 37
Moldova 39 38 38 37 37
Turks and Caicos Islands 45 43 41 39 37
Sudan 36 36 37 37 38
Congo, Dem. Rep. 36 37 37 37 38
Uganda 40 39 39 38 38
Macedonia, FYR 38 38 38 38 38
Montenegro 40 39 39 39 38
Chad 39 39 39 39 39
Angola 42 41 40 39 39
Peru 39 39 39 39 39
Cabo Verde 41 40 40 40 39
Equatorial Guinea 41 41 40 40 40
Mali 40 40 40 40 40
Kyrgyz Republic 38 38 39 39 40
Trinidad and Tobago 44 44 43 42 41
Cambodia 43 44 43 42 41
Chile 42 42 42 42 41
Sierra Leone 39 40 40 41 42
Estonia 44 43 42 42 43
Central African Republic 44 44 43 43 43
Cote d'Ivoire 44 44 44 44 43
Burkina Faso 44 44 44 44 44
Azerbaijan 45 45 45 45 44
Georgia 47 46 46 45 44
Ireland 46 46 45 45 45
Costa Rica 48 47 47 46 46
Lesotho 52 51 49 48 47
Israel 48 48 47 47 48
Guinea 54 53 51 49 48
Virgin Islands (U.S.) 48 48 48 48 48
Jamaica 49 49 49 49 48
Fiji 50 50 49 49 48
Senegal 48 48 48 48 48
Mongolia 46 46 47 47 48
Latvia 49 49 49 49 48
Greece 52 51 51 50 50
Lebanon 63 58 52 51 51
Armenia 49 49 50 50 51
Portugal 53 53 53 52 52
Mauritania 53 52 52 52 52
Paraguay 53 53 52 52 52
Qatar 54 53 53 53 53
Cayman Islands 54 53 53 54 54
Afghanistan 61 60 60 58 54
Congo, Rep. 54 54 54 54 54
Uruguay 56 56 56 55 55
Guinea-Bissau 53 54 55 56 55
Gabon 63 61 59 58 56
Haiti 56 56 56 56 56
St. Vincent and the Grenadines 60 59 59 58 58
Rwanda 54 56 55 58 58
Somalia 53 55 58 58 58
Puerto Rico 60 60 60 59 59
Togo 57 57 58 58 59
Aruba 64 63 62 60 59
Panama 63 63 62 61 60
Malta 64 63 62 62 61
Isle of Man 60 60 61 61 62
Burundi 69 67 65 64 63
Iceland 62 63 63 63 64
Marshall Islands 67 66 65 65 65
Gambia, The 65 65 65 65 65
Lao PDR 70 69 68 66 65
Seychelles 72 71 71 70 69
Guyana 71 71 71 71 70
Timor-Leste 80 78 76 73 71
Eritrea 68 69 70 71 72
Vanuatu 74 74 73 73 73
Djibouti 70 72 74 74 74
Sao Tome and Principe 82 80 79 77 75
Suriname 75 76 76 77 78
Solomon Islands 82 81 81 81 80
Bahamas, The 85 84 84 84 84
Liberia 100 100 100 100 89
St. Kitts and Nevis 91 90 89 89 89
American Samoa 93 93 92 92 91
Guam 94 94 93 92 92
French Polynesia 94 94 94 95 95
Palau 97 97 97 97 97
Faeroe Islands 98 99 99 99 98
Samoa 99 99 99 99 99
Singapore 100 99 99 98 99
Barbados 100 100 100 100 99
Maldives 100 100 99 100 100
Monaco 99 99 100 100 100
Grenada 100 100 99 100 100
Macao SAR, China 100 100 100 100 100
Antigua and Barbuda 100 100 100 100 100
Northern Mariana Islands 100 100 100 100 100
New Caledonia 100 100 100 100 100
Hong Kong SAR, China 100 100 100 100 100
Liechtenstein 100 100 100 100 100
Tonga 99 99 100 100 100
Kiribati 100 100 100 100 100
Tuvalu 99 99 100 100 100
Curacao
Bhutan
West Bank and Gaza
Slovak Republic
Belize
Kuwait 66 69 71
Kosovo
South Sudan
Sint Maarten (Dutch part)
St. Martin (French part)

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