Rank	Countries/Territories	Count	Percent
1	United States	323	33.5%
2	China	305	31.7%
3	Germany	75	7.8%
4	Japan	29	3%
5	Czech Republic	28	2.9%
6	Netherlands	23	2.4%
7	France	22	2.3%
8	Singapore	20	2.1%
9	Mongolia	18	1.9%
10	Australia	17	1.8%
11	Korea, Republic of	14	1.5%
12	Norway	12	1.2%
13	Canada	10	1%
14	India	10	1%
15	Cyprus	9	0.9%
16	Turkey	9	0.9%
17	Taiwan	5	0.5%
18	Iran, Islamic Republic of	5	0.5%
19	Latvia	4	0.4%
20	United Kingdom	4	0.4%
21	Spain	4	0.4%
22	Israel	3	0.3%
23	Ireland	2	0.2%
24	Sweden	2	0.2%
25	Mexico	2	0.2%
26	Qatar	2	0.2%
27	Thailand	2	0.2%
28	Romania	1	0.1%
29	Brazil	1	0.1%
30	Macao	1	0.1%
31	Malaysia	1	0.1%