Rank	Countries/Territories	Count	Percent
1	United States	446	46.2%
2	China	277	28.7%
3	Germany	77	8%
4		21	2.2%
5	France	18	1.9%
6	Bulgaria	14	1.4%
7	Netherlands	12	1.2%
8	Singapore	10	1%
9	Japan	10	1%
10	Argentina	8	0.8%
11	Cyprus	8	0.8%
12	Canada	7	0.7%
13	Romania	6	0.6%
14	United Kingdom	6	0.6%
15	Morocco	5	0.5%
16	India	5	0.5%
17	Korea, Republic of	4	0.4%
18	Australia	4	0.4%
19	Mexico	3	0.3%
20	Turkey	3	0.3%
21	Ukraine	2	0.2%
22	Taiwan	2	0.2%
23	Russia	2	0.2%
24	Nigeria	2	0.2%
25	Philippines	2	0.2%
26	Latvia	2	0.2%
27	Iran, Islamic Republic of	2	0.2%
28	Italy	2	0.2%
29	Greece	2	0.2%
30	Hong Kong	2	0.2%
31	Kenya	1	0.1%
32	Switzerland	1	0.1%