Rank	Countries/Territories	Count	Percent
1	United States	205	33.2%
2	China	194	31.4%
3	Japan	39	6.3%
4	Germany	31	5%
5	India	28	4.5%
6	Switzerland	23	3.7%
7	Canada	11	1.8%
8	France	10	1.6%
9	Sweden	9	1.5%
10	Netherlands	9	1.5%
11	Thailand	7	1.1%
12	Ireland	5	0.8%
13	United Kingdom	4	0.6%
14	Romania	4	0.6%
15	Iran, Islamic Republic of	4	0.6%
16	Korea, Republic of	3	0.5%
17	Greece	3	0.5%
18	Australia	3	0.5%
19	Bangladesh	2	0.3%
20	Bulgaria	2	0.3%
21	Cyprus	2	0.3%
22	Egypt	2	0.3%
23	Indonesia	2	0.3%
24	Argentina	2	0.3%
25	Cameroon	2	0.3%
26	Nigeria	2	0.3%
27	Viet Nam	2	0.3%
28	Russia	1	0.2%
29	Singapore	1	0.2%
30	Mali	1	0.2%
31	Iraq	1	0.2%
32	Ethiopia	1	0.2%
33	Burkina Faso	1	0.2%
34	Belgium	1	0.2%