Region
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Russia (Federation)
1
Russia (Federation) --
2
Russia(Federation)
1
Singapore
1
Singapore --
1
Southeast Asia
2
Southeast Asia --
3
Soviet Union --
2
Taiwan
1
Taiwan --
1
Ukraine
1
Ukraine --
1
United States
3
United States --
4
Vietnam
2
Vietnam --
2
Western countries
1
Western countries --
1