Rank	Countries/Territories	Count	Percent
1	China	421	37.6%
2	United States	416	37.2%
3	Germany	125	11.2%
4	France	39	3.5%
5	Canada	24	2.1%
6	Singapore	18	1.6%
7	Netherlands	12	1.1%
8	Bulgaria	9	0.8%
9	Japan	7	0.6%
10	Russia	6	0.5%
11	Australia	6	0.5%
12	United Kingdom	5	0.4%
13	Colombia	4	0.4%
14	Cyprus	4	0.4%
15	Latvia	3	0.3%
16	India	2	0.2%
17	Iran, Islamic Republic of	2	0.2%
18	Egypt	2	0.2%
19	Argentina	2	0.2%
20	Viet Nam	2	0.2%
21	Korea, Republic of	2	0.2%
22	Romania	2	0.2%
23	Switzerland	1	0.1%
24	Uganda	1	0.1%
25	Ireland	1	0.1%
26	Lebanon	1	0.1%
27	Lithuania	1	0.1%
28	Mongolia	1	0.1%