Country name 1986 1987 1988 1989 1990
Germany 16 16 16 16 16
Luxembourg 17 17 17 17 17
Switzerland 18 17 17 17 17
Austria 18 18 17 17 17
Denmark 18 18 17 17 17
Sweden 18 18 18 18 18
Belgium 18 18 18 18 18
Italy 19 18 17 17 16
United Kingdom 19 19 19 19 19
Netherlands 19 19 18 18 18
Finland 19 19 19 19 19
Norway 20 19 19 19 19
Croatia 21 21 20 20 20
France 21 21 20 20 20
Greece 21 21 20 20 19
Japan 21 20 20 19 18
Canada 21 21 21 21 21
Hungary 21 21 21 21 20
Bulgaria 21 21 21 21 20
Latvia 21 21 22 22 21
United States 22 22 22 22 22
Ukraine 22 22 22 21 21
Estonia 22 22 22 22 22
Slovenia 22 22 22 21 21
Spain 23 22 21 21 20
Russian Federation 23 23 23 23 23
Lithuania 23 23 23 23 23
Belarus 23 23 23 23 23
Hong Kong SAR, China 23 23 22 22 21
Portugal 23 22 22 21 20
Czech Republic 23 23 22 22 22
Australia 23 23 23 22 22
Singapore 24 23 22 22 21
Malta 24 24 24 24 24
New Zealand 24 24 24 23 23
Romania 25 25 24 24 24
Aruba 25 25 25 25 25
Georgia 25 25 25 25 25
Cyprus 25 25 25 25 25
Macao SAR, China 25 26 26 26 25
Poland 26 26 26 25 25
Montenegro 26 26 26 26 25
Cuba 26 25 24 24 23
Bosnia and Herzegovina 26 26 25 25 24
Iceland 26 26 25 25 25
Barbados 26 26 25 24 24
Slovak Republic 26 26 26 26 25
Uruguay 27 26 26 26 26
Macedonia, FYR 27 27 27 26 26
Curacao 27 27 27 27 27
Moldova 27 28 28 28 28
Puerto Rico 29 29 28 28 27
Qatar 29 29 29 29 28
Antigua and Barbuda 29 29 29 29 30
Korea, Rep. 29 28 27 26 26
Ireland 30 29 29 28 28
Armenia 30 30 30 30 30
Chile 30 30 30 30 29
China 30 30 29 29 29
Korea, Dem. Rep. 30 29 28 27 27
Argentina 31 31 31 31 31
Mauritius 31 31 30 29 29
Guam 32 31 31 30 30
United Arab Emirates 32 32 32 31 31
Kazakhstan 32 32 32 32 31
Israel 33 32 32 32 31
Azerbaijan 33 33 34 34 34
Bahrain 34 33 33 33 33
Virgin Islands (U.S.) 34 33 32 30 29
Albania 34 33 33 33 33
Sri Lanka 34 33 33 33 32
Thailand 34 33 32 31 30
Trinidad and Tobago 34 34 34 34 34
New Caledonia 35 34 33 32 32
Bahamas, The 35 34 33 33 32
Suriname 35 35 34 34 34
Costa Rica 35 35 35 35 35
Equatorial Guinea 35 36 36 37 38
Seychelles 35 35 36 36 36
French Polynesia 36 36 36 36 36
Lebanon 36 36 35 35 34
Brunei Darussalam 37 36 35 35 35
Kuwait 37 37 36 36 35
Jamaica 37 36 36 35 35
Brazil 37 37 36 36 35
Kyrgyz Republic 37 37 37 38 38
Colombia 38 37 37 37 36
Panama 38 37 37 36 36
Malaysia 38 38 38 37 37
Turkey 38 38 37 37 36
Grenada 38 38 39 39 39
Guyana 39 38 37 36 35
Venezuela, RB 39 38 38 38 38
Indonesia 39 38 38 37 36
India 39 39 38 38 38
Vietnam 39 38 38 38 37
Tunisia 39 38 38 38 37
Fiji 39 39 39 39 38
Kiribati 39 39 40 40 40
St. Vincent and the Grenadines 39 39 38 38 38
St. Lucia 39 38 38 37 37
Myanmar 40 39 39 38 38
Ecuador 40 39 39 39 38
Peru 40 40 39 39 39
Dominican Republic 40 40 39 39 39
Timor-Leste 40 40 40 39 39
South Africa 40 40 40 39 39
Tonga 40 40 40 39 39
Turkmenistan 41 40 41 40 40
Egypt, Arab Rep. 41 41 41 41 41
Uzbekistan 41 41 41 41 41
Gabon 41 41 41 41 42
Morocco 41 41 41 40 40
Paraguay 41 41 41 41 41
Philippines 42 42 41 41 41
El Salvador 42 41 41 40 40
Mongolia 42 42 41 41 40
Bolivia 42 42 42 42 41
Mexico 42 41 40 40 39
Nepal 42 42 42 42 42
Samoa 42 42 41 41 40
Haiti 43 43 43 43 43
Central African Republic 43 43 43 43 43
Saudi Arabia 43 42 42 42 42
Pakistan 43 43 43 43 43
Tajikistan 43 43 43 44 44
Guinea 43 43 44 44 44
Cambodia 43 44 44 44 44
Bangladesh 44 43 43 43 42
Sierra Leone 44 44 44 44 44
Bhutan 44 44 44 44 44
Guinea-Bissau 44 44 44 45 45
Vanuatu 44 44 44 44 44
South Sudan 44 44 44 44 44
Libya 44 44 43 42 42
Somalia 44 44 45 45 45
Papua New Guinea 44 44 43 43 42
Lao PDR 44 44 44 44 44
Lesotho 44 44 44 44 44
Congo, Rep. 45 44 44 44 44
Djibouti 45 45 45 45 45
Belize 45 44 44 44 43
Ghana 45 45 44 44 44
Mauritania 45 45 45 45 45
Algeria 45 45 44 44 43
Nigeria 45 45 45 45 45
Cabo Verde 45 45 46 46 46
Congo, Dem. Rep. 45 45 45 46 46
Cote d'Ivoire 45 45 45 45 45
Madagascar 45 45 45 45 45
Micronesia, Fed. Sts. 45 45 45 44 44
Liberia 45 46 45 45 45
Mali 46 46 46 46 47
Oman 46 46 46 46 45
Mozambique 46 46 47 47 47
Benin 46 46 46 46 46
Iran, Islamic Rep. 46 46 46 46 45
Guatemala 46 46 46 46 45
Cameroon 46 46 46 46 46
Honduras 46 46 46 46 45
Iraq 46 46 46 46 46
Botswana 46 46 46 45 45
Ethiopia 46 46 46 46 46
Namibia 46 46 45 44 44
Comoros 46 46 47 47 47
Burundi 46 47 47 48 48
Sudan 46 46 46 46 45
Gambia, The 46 46 46 46 46
Tanzania 46 46 46 46 46
Togo 47 47 47 46 46
Eritrea 47 47 47 47 47
Chad 47 47 47 47 47
Maldives 47 47 47 47 48
Nicaragua 47 47 46 46 46
Burkina Faso 47 47 47 47 47
Jordan 47 47 47 46 46
Solomon Islands 47 47 47 46 45
Malawi 47 47 47 46 46
Sao Tome and Principe 47 48 48 48 48
Afghanistan 47 48 48 48 48
Senegal 48 48 47 47 47
Zambia 48 48 48 48 47
Angola 48 48 48 48 48
Niger 48 48 48 48 48
Zimbabwe 48 47 47 47 46
Uganda 48 48 48 48 48
Syrian Arab Republic 48 48 48 47 47
Swaziland 49 49 49 48 48
Rwanda 50 50 50 50 50
Kenya 50 50 50 49 49
Yemen, Rep. 51 51 51 52 52
Palau
Monaco
Andorra
St. Kitts and Nevis
St. Martin (French part)
Serbia 24
Marshall Islands
Liechtenstein
Turks and Caicos Islands
Faeroe Islands
Tuvalu
American Samoa
Cayman Islands
Isle of Man
San Marino
Northern Mariana Islands
Greenland
West Bank and Gaza 49
Dominica
Sint Maarten (Dutch part)
Bermuda

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