National championships - 
Singapore
Afghanistan
Albania
Algeria
Angola
Antigua and Barbuda
Argentina
Aruba
Australia
Austria
Azerbaijan
Bahamas
Bahrain
Bangladesh
Barbados
Belarus
Belgium
Belize
Benin
Bermuda
Bolivia
Bosnia and Herzegovina
Botswana
Brazil
Brunei Darussalam
Bulgaria
Burkina Faso
Burundi
Cameroon
Canada
Chile
China
Colombia
Costa Rica
Croatia
Cuba
Curaçao
Cyprus
Czech Republic
Denmark
Dominican Republic
Ecuador
Egypt
El Salvador
Eritrea
Estonia
Ethiopia
Finland
France
Germany
Ghana
Greece
Guam
Guatemala
Guyana
Honduras
Hong Kong
Hungary
Iceland
India
Indonesia
Iran
Iraq
Ireland
Israel
Italy
Ivory Coast
Jamaica
Japan
Kazakhstan
Kenya
Korea Rep.
Kosovo
Kuwait
Lao People's Democratic Republic
Latvia
Lesotho
Liechtenstein
Lithuania
Luxembourg
Macau
Madagascar
Malaysia
Malta
Mauritius
Mexico
Mongolia
Morocco
Namibia
Netherlands
New Zealand
Nicaragua
Nigeria
North Macedonia
Norway
Pakistan
Panama
Paraguay
Peru
Philippines
Poland
Portugal
Puerto Rico
Refugee
Romania
Russian Federation
Rwanda
Samoa
San Marino
Saudi Arabia
Senegal
Serbia
Sierra Leone- Singapore
Sint Maarten (Dutch part)
Slovakia
Slovenia
South Africa
Spain
Sweden
Switzerland
Syrian Arab Republic
Taiwan
Trinidad and Tobago
Tanzania, United Republic of
Thailand
Tunisia
Turkey
Uganda
Ukraine
United Arab Emirates
United Kingdom
United States of America
Unknown Country
Unknown Country
Unknown Country
Uruguay
Uzbekistan
Venezuela
Viet Nam
Virgin Islands (British)
Zimbabwe