Rank	Countries/Territories	Count	Percent
1	United States	540	45.6%
2	China	279	23.5%
3	Germany	85	7.2%
4	Canada	45	3.8%
5		40	3.4%
6	Russia	29	2.4%
7	Japan	27	2.3%
8	Argentina	22	1.9%
9	France	20	1.7%
10	Singapore	17	1.4%
11	Switzerland	16	1.4%
12	Netherlands	9	0.8%
13	Korea, Republic of	7	0.6%
14	India	5	0.4%
15	Iran, Islamic Republic of	5	0.4%
16	Ireland	4	0.3%
17	Spain	4	0.3%
18	United Kingdom	3	0.3%
19	Viet Nam	3	0.3%
20	Indonesia	3	0.3%
21	Italy	3	0.3%
22	Australia	3	0.3%
23	Bangladesh	2	0.2%
24	Cyprus	2	0.2%
25	Mexico	2	0.2%
26	Romania	2	0.2%
27	Taiwan	2	0.2%
28	Ukraine	1	0.1%
29	South Africa	1	0.1%
30	Norway	1	0.1%
31	Austria	1	0.1%
32	Malaysia	1	0.1%
33	Israel	1	0.1%