Rank	Countries/Territories	Count	Percent
1	United States	438	40.6%
2	China	325	30.1%
3	Germany	107	9.9%
4	India	37	3.4%
5	Japan	28	2.6%
6	Sweden	17	1.6%
7	Singapore	11	1%
8		11	1%
9	Czech Republic	10	0.9%
10	Iran, Islamic Republic of	10	0.9%
11	Russia	9	0.8%
12	United Kingdom	9	0.8%
13	Canada	7	0.6%
14	Hong Kong	6	0.6%
15	Italy	6	0.6%
16	Netherlands	6	0.6%
17	Poland	5	0.5%
18	France	5	0.5%
19	Guinea	5	0.5%
20	Australia	3	0.3%
21	Cyprus	3	0.3%
22	Ireland	3	0.3%
23	Taiwan	2	0.2%
24	Thailand	2	0.2%
25	Uzbekistan	2	0.2%
26	Denmark	2	0.2%
27	Chile	2	0.2%
28	Korea, Republic of	2	0.2%
29	Malta	1	0.1%
30	Mongolia	1	0.1%
31	Brazil	1	0.1%
32	Venezuela, Bolivarian Republic of	1	0.1%
33	Norway	1	0.1%
34	Serbia	1	0.1%