Rank	Countries/Territories	Count	Percent
1	United States	312	35.5%
2	China	278	31.6%
3	Germany	76	8.6%
4	Japan	25	2.8%
5	Taiwan	22	2.5%
6	Singapore	19	2.2%
7	Canada	16	1.8%
8	Norway	15	1.7%
9	Ukraine	15	1.7%
10	Sweden	14	1.6%
11	Switzerland	12	1.4%
12	Korea, Republic of	11	1.2%
13	France	9	1%
14	Iran, Islamic Republic of	7	0.8%
15	Ireland	7	0.8%
16	Indonesia	5	0.6%
17	Belarus	5	0.6%
18	Cyprus	4	0.5%
19	United Kingdom	4	0.5%
20	Netherlands	4	0.5%
21	Mongolia	3	0.3%
22	India	3	0.3%
23	Italy	2	0.2%
24	Malaysia	2	0.2%
25	Hong Kong	2	0.2%
26	Australia	2	0.2%
27	Austria	2	0.2%
28	Philippines	2	0.2%
29	Romania	2	0.2%