Rank	Countries/Territories	Count	Percent
1	United States	173	46%
2	China	80	21.3%
3	Germany	41	10.9%
4	India	15	4%
5	Japan	13	3.5%
6	Switzerland	10	2.7%
7	Tunisia	6	1.6%
8	Turkey	4	1.1%
9	Netherlands	4	1.1%
10	Hungary	4	1.1%
11	Chile	4	1.1%
12	Cyprus	3	0.8%
13	France	3	0.8%
14		3	0.8%
15	Russia	3	0.8%
16	Singapore	2	0.5%
17	Australia	2	0.5%
18	Brazil	2	0.5%
19	Cuba	2	0.5%
20	Lithuania	1	0.3%
21	Iran, Islamic Republic of	1	0.3%