Rank	Countries/Territories	Count	Percent
1	United States	432	32.1%
2	China	329	24.5%
3	Czech Republic	294	21.9%
4	Germany	88	6.5%
5	Japan	38	2.8%
6	Canada	23	1.7%
7	Singapore	21	1.6%
8	India	17	1.3%
9	Yemen	12	0.9%
10	Australia	10	0.7%
11	Korea, Republic of	9	0.7%
12	Malaysia	9	0.7%
13	Netherlands	8	0.6%
14	Turkey	7	0.5%
15	Cyprus	6	0.4%
16	France	6	0.4%
17	United Kingdom	5	0.4%
18	South Africa	5	0.4%
19	Iran, Islamic Republic of	4	0.3%
20	Thailand	3	0.2%
21	Taiwan	2	0.1%
22	Mongolia	2	0.1%
23	Ireland	2	0.1%
24	Luxembourg	2	0.1%
25	Greece	2	0.1%
26	Pakistan	1	0.1%
27	Peru	1	0.1%
28	Philippines	1	0.1%
29	Russia	1	0.1%
30	Saudi Arabia	1	0.1%
31	Serbia	1	0.1%
32	Spain	1	0.1%
33	Sweden	1	0.1%