Rank	Countries/Territories	Count	Percent
1	United States	654	52.1%
2	China	249	19.8%
3	Germany	153	12.2%
4	Bulgaria	28	2.2%
5	Singapore	23	1.8%
6	France	20	1.6%
7	Netherlands	16	1.3%
8	Turkey	14	1.1%
9	India	9	0.7%
10	Japan	9	0.7%
11	Korea, Republic of	9	0.7%
12	Australia	8	0.6%
13	United Kingdom	6	0.5%
14	Thailand	5	0.4%
15	Canada	5	0.4%
16	Cyprus	4	0.3%
17	Argentina	4	0.3%
18	Hong Kong	4	0.3%
19	Switzerland	4	0.3%
20	Russia	4	0.3%
21	Romania	3	0.2%
22	Spain	3	0.2%
23	Indonesia	3	0.2%
24	Ukraine	3	0.2%
25	Egypt	3	0.2%
26	Bangladesh	3	0.2%
27	Latvia	2	0.2%
28	Nigeria	2	0.2%
29	Iran, Islamic Republic of	1	0.1%
30	Taiwan	1	0.1%
31	Lebanon	1	0.1%
32	Mongolia	1	0.1%
33	Finland	1	0.1%