Rank	Countries/Territories	Count	Percent
1	United States	478	38.8%
2	China	324	26.3%
3	Germany	97	7.9%
4	Japan	45	3.7%
5	South Africa	39	3.2%
6	Singapore	37	3%
7	United Kingdom	27	2.2%
8	Romania	24	1.9%
9	France	21	1.7%
10	Australia	19	1.5%
11	Netherlands	12	1%
12	Hong Kong	8	0.6%
13	India	7	0.6%
14	Brazil	7	0.6%
15	Korea, Republic of	7	0.6%
16	Latvia	6	0.5%
17	Mongolia	6	0.5%
18	Argentina	5	0.4%
19	Canada	5	0.4%
20	Cyprus	5	0.4%
21	Ukraine	5	0.4%
22	Tunisia	5	0.4%
23	Turkey	4	0.3%
24	Mexico	4	0.3%
25	Nigeria	4	0.3%
26	Lebanon	3	0.2%
27	Ghana	3	0.2%
28	Taiwan	3	0.2%
29	Tanzania, United Republic of	2	0.2%
30	Iraq	2	0.2%
31	Ireland	2	0.2%
32	Colombia	2	0.2%
33	Kenya	2	0.2%
34	Russia	2	0.2%
35	Sweden	2	0.2%
36	Switzerland	1	0.1%
37	Pakistan	1	0.1%
38	Portugal	1	0.1%
39	Denmark	1	0.1%
40	Belgium	1	0.1%
41	Iran, Islamic Republic of	1	0.1%
42	Georgia	1	0.1%
43	Zimbabwe	1	0.1%