Rank	Countries/Territories	Count	Percent
1	United States	308	37.8%
2	China	210	25.8%
3	Germany	71	8.7%
4	Korea, Republic of	31	3.8%
5	Canada	27	3.3%
6	Japan	22	2.7%
7	Belgium	22	2.7%
8	United Kingdom	18	2.2%
9	Iran, Islamic Republic of	9	1.1%
10	Ireland	9	1.1%
11	Singapore	8	1%
12	Australia	7	0.9%
13	India	6	0.7%
14	Argentina	5	0.6%
15	Bangladesh	5	0.6%
16	Turkey	5	0.6%
17	Russia	4	0.5%
18	Netherlands	4	0.5%
19	Cyprus	4	0.5%
20	Czech Republic	3	0.4%
21	France	3	0.4%
22	Indonesia	3	0.4%
23	Brazil	3	0.4%
24	Poland	3	0.4%
25	Portugal	3	0.4%
26	Switzerland	3	0.4%
27	Tanzania, United Republic of	3	0.4%
28	Thailand	3	0.4%
29	Spain	2	0.2%
30	Mongolia	2	0.2%
31	Nigeria	2	0.2%
32	New Zealand	1	0.1%
33	Malaysia	1	0.1%
34	Mexico	1	0.1%
35	Viet Nam	1	0.1%
36	Italy	1	0.1%
37	Bahrain	1	0.1%