1990s	1910s	1920s	1930s	1940s	1950s	1960s	1970s	1980s	1990s	2000s	2010s
Africa	0	0	0	0	0	1	1	1	3	3	4	3
Asia	0	1	1	1	1	2	3	5	7	6	16	6
MidEast	0	0	0	0	0	0	1	2	1	9	6	1
Latin America	0	0	0	1	2	0	1	3	6	4	1	1
East Europe	10	2	3	2	3	7	9	16	11	9	9	3