Rank	Countries/Territories	Count	Percent
1	United States	374	38.8%
2	China	289	29.9%
3	Germany	124	12.8%
4	Canada	39	4%
5	France	24	2.5%
6	Ireland	24	2.5%
7	Japan	18	1.9%
8	Korea, Republic of	9	0.9%
9	Bulgaria	8	0.8%
10	Singapore	8	0.8%
11	United Kingdom	7	0.7%
12	Argentina	6	0.6%
13	Netherlands	6	0.6%
14	Poland	4	0.4%
15	Switzerland	3	0.3%
16	Ukraine	2	0.2%
17	Sweden	2	0.2%
18	Malaysia	2	0.2%
19	Iran, Islamic Republic of	2	0.2%
20	Australia	2	0.2%
21	Bangladesh	2	0.2%
22	Greece	2	0.2%
23	Cyprus	2	0.2%
24	Denmark	1	0.1%
25	Hong Kong	1	0.1%
26	Italy	1	0.1%
27	Norway	1	0.1%
28	Russia	1	0.1%
29	Spain	1	0.1%