Rank	Countries/Territories	Count	Percent
1	United States	234	35.1%
2	China	144	21.6%
3	Germany	89	13.4%
4	Japan	58	8.7%
5	France	26	3.9%
6	Serbia	16	2.4%
7	Canada	13	2%
8	Singapore	12	1.8%
9	Pakistan	12	1.8%
10	United Kingdom	7	1.1%
11	Korea, Republic of	6	0.9%
12	Netherlands	5	0.8%
13	Taiwan	5	0.8%
14	Russia	4	0.6%
15	India	4	0.6%
16	Iran, Islamic Republic of	4	0.6%
17	Argentina	4	0.6%
18	Australia	3	0.5%
19	Cyprus	3	0.5%
20	Ukraine	3	0.5%
21	Turkey	2	0.3%
22	Portugal	2	0.3%
23	Colombia	2	0.3%
24	Austria	2	0.3%
25	Bulgaria	2	0.3%
26	Ireland	1	0.2%
27	Mexico	1	0.2%
28	Kazakhstan	1	0.2%
29	Spain	1	0.2%