Rank	Countries/Territories	Count	Percent
1	United States	304	37.7%
2	China	252	31.2%
3	Germany	85	10.5%
4	Japan	17	2.1%
5	United Kingdom	17	2.1%
6	India	16	2%
7	Netherlands	15	1.9%
8	Canada	13	1.6%
9	Kenya	11	1.4%
10	Korea, Republic of	11	1.4%
11	Taiwan	10	1.2%
12	Russia	8	1%
13	Switzerland	7	0.9%
14	Singapore	6	0.7%
15	Australia	6	0.7%
16	France	4	0.5%
17	Greece	4	0.5%
18	Ireland	3	0.4%
19	Ukraine	3	0.4%
20	Romania	2	0.2%
21	Argentina	2	0.2%
22	Cyprus	2	0.2%
23	Indonesia	2	0.2%
24	Iran, Islamic Republic of	2	0.2%
25	Nigeria	1	0.1%
26	Norway	1	0.1%
27	Malaysia	1	0.1%
28	Egypt	1	0.1%
29	Hong Kong	1	0.1%