- Year 1991
- Country Bulgaria
-
- Any
- Afghanistan 18
- Africa 2
- Albania 2
- Algeria 1
- Angola 3
- Antigua and Barbuda 1
- Argentina 4
- Australia 66
- Austria 1
- Bahrain 1
- Balkans 1
- Bangladesh 2
- Belarus 1
- Belgium 1
- Bhutan 2
- Bolivia 1
- Bosnia and Herzegovina 7
- Botswana 2
- Brazil 3
- Bulgaria 1
- Cambodia 8
- Canada 5
- Chechnya 1
- Chile 4
- China 46
- Colombia 3
- DRC 2
- Cook Islands 1
- Croatia 1
- Cuba 3
- Cyprus 2
- Czech Republic 4
- Eastern Europe 3
- Ecuador 3
- Egypt 6
- Eritrea 2
- Ethiopia 1
- Fiji 3
- France 11
- Germany 4
- Gibraltar 2
- Greece 2
- Guatemala 2
- Haiti 1
- Hong Kong 3
- Hungary 2
- Iceland 2
- India 32
- Indonesia 33
- Iran, Islamic Republic of 6
- Iraq 17
- Ireland 3
- Israel/Palestine 20
- Italy 15
- Jamaica 1
- Japan 30
- Jordan 2
- Kazakhstan 2
- Kenya 5
- North Korea 4
- South Korea 7
- Kosovo 4
- Kuwait 3
- Kyrgyzstan 2
- Lao Peoples Democratic Republic 2
- Lebanon 3
- Lesotho 1
- Libyan Arab Jamahiriya 1
- Lithuania 1
- Macedonia 1
- Malaysia 10
- Mali 1
- Mexico 7
- Micronesia 1
- Monaco 1
- Mongolia 3
- Montenegro 1
- Morocco 2
- Mozambique 1
- Myanmar 5
- Nauru 1
- Nepal 7
- Netherlands 2
- New Zealand 7
- Nicaragua 1
- Nigeria 3
- Norway 1
- Pakistan 9
- Palau 1
- Papua New Guinea 11
- Peru 5
- Philippines 17
- Poland 1
- Portugal 1
- Puerto Rico 1
- Qatar 2
- Romania 4
- Russian Federation 32
- Rwanda 2
- Saudi Arabia 1
- Serbia 5
- Slovakia 1
- Solomon Islands 3
- South Africa 20
- Spain 5
- Sri Lanka 3
- Sudan 3
- Suriname 1
- Sweden 1
- Switzerland 3
- Syrian Arab Republic 2
- Taiwan 1
- Tajikistan 1
- Thailand 20
- Tibet 2
- Timor-Leste 12
- Turkey 11
- Uganda 5
- Ukraine 1
- United Arab Emirates 2
- United Kingdom 16
- United States 58
- Uzbekistan 3
- Venezuela 5
- Vietnam 7
- World 15
- Yemen 1
- Zimbabwe 4