Rank	Countries/Territories	Count	Percent
1	United States	342	34.7%
2	China	337	34.1%
3	Germany	143	14.5%
4	Japan	29	2.9%
5	Canada	25	2.5%
6		25	2.5%
7	Singapore	16	1.6%
8	Netherlands	11	1.1%
9	Korea, Republic of	8	0.8%
10	Australia	6	0.6%
11	France	6	0.6%
12	Sweden	6	0.6%
13	India	5	0.5%
14	Cyprus	4	0.4%
15	Ireland	3	0.3%
16	Switzerland	3	0.3%
17	Taiwan	2	0.2%
18	Peru	2	0.2%
19	Mongolia	2	0.2%
20	Iran, Islamic Republic of	2	0.2%
21	Argentina	2	0.2%
22	Bangladesh	1	0.1%
23	Indonesia	1	0.1%
24	Malaysia	1	0.1%
25	Norway	1	0.1%
26	Poland	1	0.1%
27	Spain	1	0.1%
28	Thailand	1	0.1%
29	United Kingdom	1	0.1%