Rank	Countries/Territories	Count	Percent
1	United States	260	43.8%
2	China	135	22.8%
3	Germany	50	8.4%
4	Canada	13	2.2%
5	United Kingdom	11	1.9%
6	Japan	10	1.7%
7	Netherlands	10	1.7%
8	Singapore	9	1.5%
9	Hungary	9	1.5%
10	India	8	1.3%
11	France	8	1.3%
12	Denmark	8	1.3%
13	Korea, Republic of	8	1.3%
14	Sweden	8	1.3%
15	Australia	7	1.2%
16	Estonia	5	0.8%
17	Iran, Islamic Republic of	4	0.7%
18	Hong Kong	3	0.5%
19	Pakistan	3	0.5%
20	Spain	3	0.5%
21	Norway	2	0.3%
22	Mongolia	2	0.3%
23	Morocco	2	0.3%
24	Taiwan	2	0.3%
25	Turkey	2	0.3%
26	Venezuela, Bolivarian Republic of	2	0.3%
27	Ireland	2	0.3%
28	Brazil	2	0.3%
29	Colombia	2	0.3%
30	Cyprus	2	0.3%
31	Czech Republic	1	0.2%