Country name 1986 1987 1988 1989 1990
Angola 39 39 39 39 39
South Sudan 40 40 41 41 42
Sierra Leone 40 39 38 38 37
Mozambique 41 41 41 41 42
Niger 42 42 43 43 44
Eritrea 44 44 45 45 46
Timor-Leste 44 45 45 46 47
Malawi 44 43 43 43 43
Ethiopia 44 44 45 45 46
Mali 44 45 45 46 47
Somalia 45 45 44 44 44
Uganda 45 45 44 43 43
Chad 45 45 46 46 46
Equatorial Guinea 45 46 46 46 47
Guinea 45 46 47 48 49
Nigeria 45 45 45 45 45
Liberia 45 45 45 45 45
Afghanistan 46 46 47 48 49
Guinea-Bissau 46 46 46 47 47
Zambia 46 45 44 43 42
Congo, Dem. Rep. 47 47 47 47 48
Rwanda 47 44 40 35 31
Burundi 47 47 47 47 46
Central African Republic 47 47 47 47 47
Benin 48 49 49 50 51
Burkina Faso 48 48 48 48 48
Madagascar 49 49 49 49 50
Tanzania 49 49 49 49 49
Gambia, The 49 50 50 51 51
Bhutan 50 50 51 52 53
Cambodia 50 50 51 51 51
Lao PDR 50 51 51 52 52
Nepal 50 51 52 53 54
Cote d'Ivoire 51 51 51 51 51
Iran, Islamic Rep. 51 54 57 59 62
Bolivia 51 52 52 53 53
Cameroon 52 52 52 52 52
Haiti 52 52 52 53 53
Papua New Guinea 52 52 53 53 53
Comoros 53 53 54 55 55
Togo 53 54 54 54 55
Senegal 53 54 55 55 56
Sudan 53 54 54 54 54
Ghana 54 54 55 55 56
Yemen, Rep. 54 55 55 56 56
Djibouti 54 55 55 55 55
El Salvador 55 56 57 58 59
Congo, Rep. 55 55 54 54 54
Myanmar 55 55 56 56 57
Lesotho 56 56 57 57 58
Bangladesh 56 56 57 57 58
Mauritania 56 56 57 57 57
India 56 56 57 57 58
Kiribati 56 56 57 57 58
Swaziland 56 57 57 58 58
Solomon Islands 56 56 56 56 56
Mongolia 57 57 57 58 58
South Africa 57 57 58 58 58
Guatemala 58 58 59 59 59
Iraq 58 59 61 62 63
Namibia 58 58 58 59 59
Kenya 58 58 58 57 57
Nicaragua 58 59 60 60 61
Gabon 58 59 59 60 60
Pakistan 58 59 59 59 59
Turkey 59 59 60 60 61
Turkmenistan 59 59 59 59 59
Maldives 59 60 61 61 62
Sao Tome and Principe 59 59 60 60 60
Guyana 60 60 60 60 60
Samoa 60 60 61 61 62
Vanuatu 60 60 61 61 62
Zimbabwe 60 60 60 59 58
Egypt, Arab Rep. 60 61 61 62 62
Brazil 60 61 61 61 62
Indonesia 61 61 61 62 62
Morocco 61 61 62 63 63
Botswana 61 61 61 61 61
Tajikistan 61 61 61 60 60
Greenland 61 61 61 61 61
Peru 61 62 62 63 63
Kyrgyz Republic 61 62 62 64 64
Philippines 62 62 62 62 63
Azerbaijan 62 62 61 61 61
Honduras 62 63 63 64 64
Cabo Verde 62 63 63 64 64
Fiji 63 63 63 63 64
Oman 63 64 64 65 65
Moldova 63 64 64 64 64
Algeria 63 64 65 65 65
Dominican Republic 64 64 65 65 65
Uzbekistan 64 64 64 64 64
Suriname 64 64 64 64 64
Colombia 64 64 64 64 64
Kazakhstan 64 65 65 64 64
Ecuador 65 65 66 66 67
Tunisia 65 65 66 66 69
Korea, Dem. People’s Rep. 65 65 66 66 66
Russian Federation 65 65 65 64 64
Mauritius 65 65 65 65 66
Trinidad and Tobago 65 65 65 65 65
Vietnam 65 65 65 66 66
Korea, Rep. 65 66 66 67 67
Micronesia, Fed. Sts. 65 65 65 66 66
French Polynesia 65 66 66 66 67
Paraguay 65 65 65 66 66
Hungary 65 66 66 65 65
Libya 65 66 66 67 67
Ukraine 65 66 66 66 66
Estonia 66 66 67 66 65
Grenada 66 66 66 66 66
New Caledonia 66 67 66 67 68
Saudi Arabia 66 66 67 67 67
Thailand 66 66 67 67 67
Mexico 66 67 67 67 68
Sri Lanka 66 66 66 66 66
Georgia 66 66 66 66 66
Latvia 66 66 66 65 64
Armenia 66 66 66 65 65
Venezuela, RB 67 67 67 67 67
Romania 67 66 67 67 67
Bahamas, The 67 67 67 67 67
Poland 67 67 67 67 67
China 67 67 67 67 67
St. Vincent and the Grenadines 67 67 67 68 68
Jordan 67 68 68 68 69
Belarus 67 67 67 67 66
Argentina 67 68 68 68 68
Slovak Republic 67 67 67 67 67
Czech Republic 67 68 68 68 68
Lebanon 67 68 68 68 69
Tonga 68 68 68 68 68
Chile 68 68 69 69 69
Antigua and Barbuda 68 68 68 68 69
St. Lucia 68 68 68 68 69
Croatia 68 68 68 68 69
Syrian Arab Republic 68 68 69 69 69
Slovenia 68 68 68 69 69
Lithuania 68 68 67 67 66
Barbados 68 68 68 69 69
Malaysia 68 68 69 69 69
Uruguay 68 68 69 69 69
Macedonia, FYR 68 69 69 69 69
Bulgaria 69 68 68 68 68
Guam 69 69 69 70 70
Bosnia and Herzegovina 69 69 68 68 67
Albania 69 69 69 69 69
United Arab Emirates 69 69 70 70 71
Panama 69 70 70 70 70
Belize 69 69 69 69 69
Virgin Islands (U.S.) 70 70 70 71 71
Portugal 70 70 70 71 71
St. Martin (French part) 70 71 71 71 71
Luxembourg 70 71 71 71 71
Jamaica 70 70 70 70 70
Bahrain 70 71 71 71 71
Kuwait 70 71 71 71 71
Brunei Darussalam 71 71 71 71 72
Finland 71 71 71 71 71
Puerto Rico 71 70 70 70 70
Aruba 71 71 71 71 71
Montenegro 71 71 71 71 71
New Zealand 71 71 71 72 73
Austria 71 72 72 72 72
Ireland 71 71 72 72 72
Germany 71 71 72 72 72
United States 71 71 71 72 72
Belgium 71 72 72 72 73
France 72 72 72 72 73
Denmark 72 72 72 72 72
Faroe Islands 72 72 72 73 73
Malta 72 72 72 73 73
Macao SAR, China 72 72 73 73 73
Singapore 72 73 73 73 73
United Kingdom 72 73 73 73 73
Costa Rica 72 72 73 73 73
Greece 72 72 73 74 75
Italy 73 73 73 74 74
Australia 73 73 73 74 74
Cuba 73 73 73 73 73
Norway 73 73 73 73 73
Netherlands 73 74 74 74 74
Israel 73 74 74 75 75
Canada 73 74 74 74 74
Spain 73 73 73 73 73
Qatar 73 74 74 74 74
Switzerland 74 74 74 74 74
Cyprus 74 74 74 74 75
Sweden 74 74 74 75 75
Hong Kong SAR, China 74 74 74 74 75
Japan 75 76 76 76 76
Iceland 75 75 74 76 75
Curacao
Isle of Man
Bermuda
Monaco
Northern Mariana Islands
Andorra
Sint Maarten (Dutch part)
St. Kitts and Nevis 64
Serbia
San Marino
Seychelles 67
Liechtenstein
Cayman Islands
Palau 63
Marshall Islands 70
Turks and Caicos Islands
West Bank and Gaza 67
Tuvalu
American Samoa
Dominica 71

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