Rank	Countries/Territories	Count	Percent
1	United States	447	37.2%
2	China	401	33.4%
3	Germany	126	10.5%
4	France	40	3.3%
5	Canada	39	3.2%
6	Ireland	30	2.5%
7	Japan	18	1.5%
8	Korea, Republic of	10	0.8%
9		10	0.8%
10	Bulgaria	9	0.7%
11	United Kingdom	9	0.7%
12	Singapore	8	0.7%
13	Netherlands	7	0.6%
14	Argentina	6	0.5%
15	Hong Kong	5	0.4%
16	Poland	4	0.3%
17	Norway	3	0.2%
18	Switzerland	3	0.2%
19	Cyprus	3	0.2%
20	Denmark	3	0.2%
21	Australia	2	0.2%
22	Bangladesh	2	0.2%
23	Greece	2	0.2%
24	Iran, Islamic Republic of	2	0.2%
25	Ukraine	2	0.2%
26	Sweden	2	0.2%
27	Russia	2	0.2%
28	Malaysia	2	0.2%
29	Mongolia	1	0.1%
30	Spain	1	0.1%
31	Italy	1	0.1%
32	India	1	0.1%