Rank	Countries/Territories	Count	Percent
1	United States	325	39.3%
2	China	200	24.2%
3	Germany	83	10%
4	France	34	4.1%
5	Japan	31	3.7%
6	India	24	2.9%
7	Korea, Republic of	14	1.7%
8	Switzerland	12	1.5%
9	Netherlands	11	1.3%
10	Philippines	10	1.2%
11	Canada	9	1.1%
12	Iran, Islamic Republic of	7	0.8%
13	Norway	7	0.8%
14	Taiwan	7	0.8%
15	United Kingdom	6	0.7%
16	Kuwait	6	0.7%
17	Russia	5	0.6%
18	Spain	4	0.5%
19	Hong Kong	4	0.5%
20	Turkey	3	0.4%
21	Chile	3	0.4%
22	Argentina	2	0.2%
23	Bangladesh	2	0.2%
24	Cyprus	2	0.2%
25	Mexico	2	0.2%
26	Ireland	2	0.2%
27	Italy	2	0.2%
28	Sweden	2	0.2%
29	Singapore	2	0.2%
30	Greece	2	0.2%
31	Ukraine	1	0.1%
32	Mongolia	1	0.1%
33	Denmark	1	0.1%
34	Australia	1	0.1%