Country name 1984 1985 1986 1987 1988
Korea, Rep. 0 0 0 0 0
Japan 0 0 0 0 0
Denmark 0 0 0 0 0
Malaysia 0 0 0 0
Norway 0 0 0 0 0
Sweden 0 0 0
Sudan 0 0 0
Seychelles 0 0 0 0 0
Greece 0 0 0 0 0
Cyprus 0 0 0 0 0
Zimbabwe 1
Italy 1 1 1 1 1
Tanzania 1 1 5 6
Malta 1 1 2 2 2
Singapore 1
Zambia 2 2
Philippines 2 1 2 2 2
Netherlands 2 2
Hong Kong SAR, China 2 2
Switzerland 2 2 2 2 2
Hungary 2 3 3 3 3
Fiji 3 2 2
New Zealand 3 3 3 3 3
Kiribati 3 3 2 1 2
Spain 4 4 4 5 2
Jamaica 4 3 3
Jordan 5 5 6 6
Grenada 5
Afghanistan 5 5
United Arab Emirates 5 6 5 6 5
Mauritius 6 6 6 9 8
Algeria 6 6 6 5 5
Botswana 6 6 5 5 5
Kuwait 6 6 5 5
Tonga 6 7 5
St. Lucia 6
Syrian Arab Republic 7 7 7 6 6
Qatar 7 8 6 8 5
Nicaragua 8 15 13 14 15
Oman 8 9 9 9 10
Brunei Darussalam 9 6
Turkey 9 9 8 8 8
El Salvador 10 8 8
Paraguay 10 9 8 8 8
Gambia, The 10 11 15 15
Bahrain 10 7 9 9 9
Panama 10 11 10 9 9
Swaziland 11 12 13 13 13
Colombia 12 17 17 12 12
Rwanda 12 12 12 13 10
Malawi 14 14 16 18 19
Burundi 14 16 18 17 18
Honduras 15
Niger 15 15 15 15
New Caledonia 15 15 15 15 15
Senegal 15 16 17 15
Burkina Faso 16 15 16 17
Belgium 17 16 15 14 15
Sao Tome and Principe 18 35
Tunisia 18 19 19 20 21
Congo, Dem. Rep. 19 21
Guinea 22 26 31 27 27
Lesotho 22 21 22 21 20
Cote d'Ivoire 26 28 28 27 25
Cabo Verde 28 29 26 26 22
Mozambique 29 24 26 26 30
Cameroon 29 28 28 28 28
Morocco 29 20 18 17 15
Benin 30 27 28 27 27
Mali 30 30 28 30
Congo, Rep. 31 32 29 31 30
Guinea-Bissau 31 42 43
Gabon 33 35 31
Togo 37 38 36 36 32
China
Estonia
Germany
Guam
Ukraine
Guatemala
Greenland
Eritrea
Bermuda
Central African Republic 29 35 34
Armenia
Ghana
American Samoa
Andorra
Guyana 5
Canada
Haiti 13 9
Finland 0 0
Equatorial Guinea
Slovak Republic
Egypt, Arab Rep. 1
St. Martin (French part)
Ecuador 6 6
Tajikistan
Iceland
Bangladesh
India 4 4
Nepal
Indonesia
Iran, Islamic Rep. 9 9
Nigeria
Iraq 21 19 19 17
Pakistan
Ireland
Cayman Islands
Russian Federation
Portugal 15
Isle of Man
Israel
Samoa
Dominican Republic
Bulgaria 1 1 1
Dominica 5
Brazil
Argentina
Solomon Islands 7
Djibouti
St. Kitts and Nevis
Kazakhstan
Bhutan
Kenya
Georgia
Aruba
Thailand
Korea, Dem. Rep.
Barbados
Antigua and Barbuda
Ethiopia 11 13
Kosovo
French Polynesia
Czech Republic
Costa Rica 9 8 9 9
Kyrgyz Republic
Comoros 33 36
Lao PDR
Chile
Australia
Northern Mariana Islands
Curacao
Chad 35
Vanuatu
Palau
Vietnam
Papua New Guinea 0 0
West Bank and Gaza
Peru
Austria
Poland
Lithuania
Puerto Rico
Luxembourg
Romania
Macao SAR, China
Cambodia
Macedonia, FYR
San Marino
Madagascar 31
Saudi Arabia
Cuba
Serbia
Angola
Sierra Leone
Maldives
Sint Maarten (Dutch part)
South Africa
Slovenia
Bosnia and Herzegovina
Somalia
Croatia
South Sudan
Marshall Islands
Sri Lanka 9 7 8
Mauritania 19 20 22 21
Bolivia
France
St. Vincent and the Grenadines
Mexico
Suriname 20 20 21
Micronesia, Fed. Sts.
Albania
Moldova
Belize
Monaco
Belarus
Mongolia
Timor-Leste
Montenegro
Turkmenistan
Trinidad and Tobago 5 3
Tuvalu
Bahamas, The
United Kingdom
Turks and Caicos Islands
Uruguay 9 8 8 7
Uganda 14
Faeroe Islands
Azerbaijan
Myanmar
United States
Namibia
Uzbekistan
Liberia
Venezuela, RB 8
Libya
Virgin Islands (U.S.)
Liechtenstein
Yemen, Rep.
Latvia
Lebanon

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