Region
Asia
1
Asia, Southeastern
2
Australia --
1
Bali Island (Indonesia)
1
China --
1
Developing countries
1
Developing countries --
2
East Asia --
2
Egypt --
1
Iran --
1
Japan
1
Japan --
1
Malaysia
3
Malaysia --
2
North America
1
North America --
1
Northern Ireland
1
Northern Ireland --
1
Philippines
1
Singapore
1
Singapore --
1
Southeast Asia --
1
Soviet Union --
1
Spratly Island --
1
United States
3
United States --
1
Vietnam --
2