Rank	Countries/Territories	Count	Percent
1	United States	292	31.9%
2	China	269	29.4%
3	Germany	84	9.2%
4	Japan	49	5.4%
5	Netherlands	39	4.3%
6	France	24	2.6%
7	Singapore	20	2.2%
8	Bulgaria	16	1.7%
9	Cyprus	13	1.4%
10	Qatar	13	1.4%
11	Canada	11	1.2%
12	Taiwan	10	1.1%
13	Australia	9	1%
14		8	0.9%
15	United Kingdom	7	0.8%
16	Argentina	6	0.7%
17	Iran, Islamic Republic of	5	0.5%
18	Russia	5	0.5%
19	Latvia	3	0.3%
20	Turkey	3	0.3%
21	Ukraine	3	0.3%
22	Ireland	3	0.3%
23	Brazil	3	0.3%
24	Bangladesh	2	0.2%
25	Spain	2	0.2%
26	Lithuania	2	0.2%
27	Moldova, Republic of	2	0.2%
28	Morocco	2	0.2%
29	Portugal	2	0.2%
30	Nigeria	1	0.1%
31	Sweden	1	0.1%
32	Switzerland	1	0.1%
33	South Africa	1	0.1%
34	Thailand	1	0.1%
35	India	1	0.1%
36	Israel	1	0.1%
37	Iraq	1	0.1%