Rank	Countries/Territories	Count	Percent
1	China	334	34.6%
2	United States	262	27.2%
3	Germany	117	12.1%
4	Bulgaria	50	5.2%
5	Hungary	46	4.8%
6	Korea, Republic of	24	2.5%
7	Singapore	16	1.7%
8	Netherlands	16	1.7%
9	Taiwan	12	1.2%
10	Japan	11	1.1%
11	France	11	1.1%
12	United Kingdom	8	0.8%
13	Hong Kong	7	0.7%
14	Nigeria	5	0.5%
15	South Africa	4	0.4%
16	Russia	4	0.4%
17	Argentina	4	0.4%
18	Australia	4	0.4%
19	Canada	3	0.3%
20	Greece	3	0.3%
21	Iran, Islamic Republic of	2	0.2%
22	Mauritius	2	0.2%
23	Mexico	2	0.2%
24	Moldova, Republic of	2	0.2%
25	Mongolia	2	0.2%
26	Thailand	2	0.2%
27	Turkey	2	0.2%
28	Ukraine	2	0.2%
29	Philippines	2	0.2%
30	Poland	1	0.1%
31	Portugal	1	0.1%
32	Latvia	1	0.1%
33	Malaysia	1	0.1%
34	Iraq	1	0.1%