Country name 1984 1985 1986 1987 1988
Afghanistan 48 48 48 48 49
Albania 37 36 36 35 35
Algeria 46 46 45 45 45
American Samoa
Andorra
Angola 47 47 47 47 47
Antigua and Barbuda 30 30 29 29 29
Argentina 31 31 31 31 31
Armenia 30 30 30 30 30
Aruba 25 25 24 25 25
Australia 24 24 23 23 23
Austria 19 18 18 18 18
Azerbaijan 33 33 33 33 34
Bahamas, The 35 35 34 34 33
Bahrain 34 34 33 33 33
Bangladesh 44 44 43 43 43
Barbados 27 27 26 25 25
Belarus 23 23 23 23 23
Belgium 19 19 18 18 18
Belize 45 45 44 44 44
Benin 45 46 46 46 46
Bermuda
Bhutan 44 44 44 44 44
Bolivia 42 42 42 42 41
Bosnia and Herzegovina 26 25 25 25 25
Botswana 46 46 46 46 46
Brazil 37 37 37 36 36
Brunei Darussalam 38 38 37 36 36
Bulgaria 22 22 21 21 21
Burkina Faso 46 47 47 47 47
Burundi 45 46 46 47 47
Cabo Verde 45 45 45 45 45
Cambodia 42 42 43 43 43
Cameroon 46 46 46 46 46
Canada 21 21 21 21 21
Cayman Islands
Central African Republic 42 42 43 43 43
Chad 46 46 47 47 47
Chile 31 31 31 30 30
China 32 31 30 30 30
Colombia 39 38 38 37 37
Comoros 46 46 46 46 46
Congo, Dem. Rep. 45 45 45 45 45
Congo, Rep. 45 44 44 44 44
Costa Rica 36 36 36 36 36
Cote d'Ivoire 45 45 45 45 45
Croatia 21 21 21 21 21
Cuba 27 26 26 25 24
Curacao 28 28 27 27 27
Cyprus 25 25 25 25 25
Czech Republic 24 23 23 23 22
Denmark 19 18 18 18 17
Djibouti 45 45 45 45 45
Dominica
Dominican Republic 41 40 40 40 39
Ecuador 40 40 40 39 39
Egypt, Arab Rep. 40 40 40 40 40
El Salvador 44 44 44 43 43
Equatorial Guinea 35 35 35 35 36
Eritrea 46 46 46 46 46
Estonia 22 22 22 22 22
Ethiopia 46 46 46 46 46
Faeroe Islands
Fiji 39 39 39 39 39
Finland 20 19 19 19 19
France 21 21 21 21 20
French Polynesia 37 36 36 36 36
Gabon 40 41 41 41 41
Gambia, The 46 46 46 46 46
Georgia 25 25 25 25 25
Germany 16 16 16 16 16
Ghana 45 45 45 44 44
Greece 22 21 21 21 20
Greenland
Grenada 38 38 38 38 39
Guam 33 32 32 31 30
Guatemala 46 46 46 46 46
Guinea 43 43 43 43 44
Guinea-Bissau 46 47 46 46 45
Guyana 39 39 38 37 36
Haiti 42 42 42 43 43
Honduras 46 46 46 46 46
Hong Kong SAR, China 24 23 23 23 22
Hungary 22 22 21 21 21
Iceland 26 26 26 26 25
India 39 38 38 38 38
Indonesia 39 39 39 38 37
Iran, Islamic Rep. 45 45 46 46 46
Iraq 46 46 46 46 46
Ireland 30 29 29 28 28
Isle of Man
Israel 33 33 33 32 32
Italy 20 19 19 18 18
Jamaica 38 37 37 36 36
Japan 22 22 21 20 20
Jordan 47 47 47 47 47
Kazakhstan 32 32 32 32 32
Kenya 50 50 50 50 50
Kiribati 39 39 39 39 40
Korea, Dem. Rep. 32 31 30 29 28
Korea, Rep. 31 30 29 28 27
Kosovo
Kuwait 37 37 36 36 36
Kyrgyz Republic 37 37 37 37 37
Lao PDR 44 44 44 44 44
Latvia 21 21 21 21 21
Lebanon 37 37 36 36 35
Lesotho 45 45 45 44 44
Liberia 45 45 45 45 45
Libya 45 44 44 43 43
Liechtenstein
Lithuania 23 23 23 23 23
Luxembourg 17 17 17 17 17
Macao SAR, China 25 25 25 25 25
Macedonia, FYR 28 28 27 27 27
Madagascar 46 46 45 45 45
Malawi 48 47 47 47 47
Malaysia 38 38 38 38 38
Maldives 45 45 46 46 46
Mali 44 45 45 45 46
Malta 24 25 25 25 25
Marshall Islands
Mauritania 45 45 45 45 45
Mauritius 33 32 31 31 30
Mexico 43 42 41 41 40
Micronesia, Fed. Sts. 46 46 45 45 45
Moldova 27 27 27 28 28
Monaco
Mongolia 42 42 42 41 41
Montenegro 27 26 26 26 26
Morocco 43 43 42 42 41
Mozambique 44 45 45 46 46
Myanmar 40 40 40 39 39
Namibia 47 47 46 46 45
Nepal 42 42 42 42 42
Netherlands 20 20 19 19 19
New Caledonia 35 35 35 34 33
New Zealand 25 25 24 24 24
Nicaragua 47 47 47 47 47
Niger 48 48 48 48 48
Nigeria 45 45 45 45 45
Northern Mariana Islands
Norway 20 20 20 19 19
Oman 45 46 46 46 46
Pakistan 43 43 43 43 43
Palau
Panama 39 38 38 37 37
Papua New Guinea 45 45 44 44 43
Paraguay 42 42 42 42 42
Peru 40 40 40 39 39
Philippines 42 42 42 41 41
Poland 25 26 26 26 25
Portugal 24 24 23 22 22
Puerto Rico 30 30 29 29 28
Qatar 29 29 29 29 29
Romania 25 25 24 24 24
Russian Federation 22 23 23 23 23
Rwanda 49 50 50 50 50
Samoa 43 43 42 42 41
San Marino
Sao Tome and Principe 47 47 47 48 48
Saudi Arabia 43 43 43 43 43
Senegal 47 47 47 47 47
Serbia
Seychelles 35 34 34 34 35
Sierra Leone 45 45 45 45 45
Singapore 25 24 24 23 22
Sint Maarten (Dutch part)
Slovak Republic 27 27 26 26 26
Slovenia 23 22 22 22 22
Solomon Islands 48 48 47 47 46
Somalia 44 44 44 44 45
South Africa 41 40 40 40 40
South Sudan 44 44 44 44 44
Spain 24 23 23 22 21
Sri Lanka 35 34 34 33 33
St. Kitts and Nevis
St. Lucia 41 41 40 39 38
St. Martin (French part)
St. Vincent and the Grenadines 40 40 39 39 39
Sudan 47 47 46 46 46
Suriname 36 36 35 35 34
Swaziland 49 49 49 49 48
Sweden 18 18 18 18 18
Switzerland 18 18 18 17 17
Syrian Arab Republic 49 48 48 48 48
Tajikistan 43 43 43 43 43
Tanzania 46 46 46 46 46
Thailand 36 35 34 33 32
Timor-Leste 40 40 40 40 40
Togo 47 47 47 46 46
Tonga 41 41 41 40 40
Trinidad and Tobago 34 34 34 34 34
Tunisia 40 40 40 39 39
Turkey 39 39 38 38 37
Turkmenistan 41 41 40 40 41
Turks and Caicos Islands
Tuvalu
Uganda 48 48 48 48 48
Ukraine 22 22 22 22 22
United Arab Emirates 31 32 32 32 32
United Kingdom 19 19 19 19 19
United States 22 22 22 22 22
Uruguay 27 27 27 27 26
Uzbekistan 41 41 41 41 41
Vanuatu 44 44 44 44 44
Venezuela, RB 39 39 39 39 38
Vietnam 39 39 39 38 38
Virgin Islands (U.S.) 34 34 33 32 31
West Bank and Gaza
Yemen, Rep. 50 51 51 52 52
Zambia 47 47 46 46 46
Zimbabwe 48 48 48 47 47

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