Rank	Countries/Territories	Count	Percent
1	United States	263	31.8%
2	China	187	22.6%
3	Germany	148	17.9%
4	Japan	37	4.5%
5	India	34	4.1%
6	Canada	19	2.3%
7	Ireland	18	2.2%
8	Korea, Republic of	13	1.6%
9	Russia	13	1.6%
10	Singapore	13	1.6%
11	Mexico	12	1.4%
12	United Kingdom	10	1.2%
13	Australia	9	1.1%
14	Israel	7	0.8%
15	Hong Kong	6	0.7%
16	Mongolia	6	0.7%
17	Netherlands	6	0.7%
18	Taiwan	4	0.5%
19	France	3	0.4%
20	Lebanon	3	0.4%
21	Iran, Islamic Republic of	2	0.2%
22	Cyprus	2	0.2%
23	Turkey	2	0.2%
24	New Zealand	2	0.2%
25	Poland	2	0.2%
26	Spain	2	0.2%
27	Viet Nam	2	0.2%
28	Slovenia	1	0.1%
29	Brazil	1	0.1%
30	Malawi	1	0.1%