Rank	Countries/Territories	Count	Percent
1	United States	259	39.5%
2	China	197	30.1%
3	Germany	53	8.1%
4	France	25	3.8%
5	Australia	16	2.4%
6	Ukraine	12	1.8%
7	Slovakia	11	1.7%
8	Canada	8	1.2%
9	Denmark	7	1.1%
10	Japan	7	1.1%
11	Korea, Republic of	6	0.9%
12	India	6	0.9%
13	Belgium	6	0.9%
14	United Kingdom	6	0.9%
15	Czech Republic	5	0.8%
16	Romania	4	0.6%
17	Netherlands	3	0.5%
18	Thailand	3	0.5%
19	Cyprus	3	0.5%
20	Brazil	2	0.3%
21	Iran, Islamic Republic of	2	0.3%
22	Hong Kong	2	0.3%
23	Jordan	2	0.3%
24	Spain	2	0.3%
25	Singapore	2	0.3%
26	Norway	1	0.2%
27	Russia	1	0.2%
28	Viet Nam	1	0.2%
29	Mexico	1	0.2%
30	Ireland	1	0.2%
31	Argentina	1	0.2%