Region
Afghanistan
15
Africa, East
1
Africa, Southern
1
Africa, Sub-Saharan
1
Albania
7
Algeria
7
Andorra
3
Angola
3
Anguilla
1
Antigua and Barbuda
7
Arctic regions
1
Argentina
17
Armenia
1
Armenia (Republic)
8
Aruba
2
Ascension
5
Australia
35
Austria
5
Azerbaijan
10
Bahamas
7
Bahrain
4
Bandiagara Caves (Mali)
2
Bangladesh
5
Barbados
3
Belarus
1
Belgium
11
Belgrade
1
Belize
7
Benin
4
Bermuda Islands
3
Bhutan
2
Bolivia
6
Bosnia and Herzegovina
3
Botswana
3
Brazil
24
British Virgin Islands
1
Brunei
2
Bulgaria
17
Burkina Faso
2
Burma
3
Burundi
3
Cabo Verde
6
Cambodia
6
Cameroon
2
Canada
46
Canal Zone
1
Cayman Islands
2
Central African Republic
1
Cernavodă
1
Chad
3
more ...