Rank	Countries/Territories	Count	Percent
1	United States	605	39.6%
2	China	477	31.2%
3	Germany	161	10.5%
4	France	72	4.7%
5		38	2.5%
6	Japan	26	1.7%
7	Canada	20	1.3%
8	Singapore	18	1.2%
9	Netherlands	15	1%
10	Ireland	13	0.9%
11	India	10	0.7%
12	Korea, Republic of	9	0.6%
13	Australia	9	0.6%
14	Cyprus	7	0.5%
15	Taiwan	7	0.5%
16	Argentina	6	0.4%
17	United Kingdom	4	0.3%
18	Viet Nam	4	0.3%
19	Spain	3	0.2%
20	Mongolia	3	0.2%
21	Greece	3	0.2%
22	Hong Kong	3	0.2%
23	Iran, Islamic Republic of	2	0.1%
24	Bangladesh	2	0.1%
25	Bulgaria	2	0.1%
26	Peru	2	0.1%
27	Russia	2	0.1%
28	Uzbekistan	2	0.1%
29	Norway	1	0.1%
30	Switzerland	1	0.1%
31	Ukraine	1	0.1%
32	Luxembourg	1	0.1%