Rank	Countries/Territories	Count	Percent
1	United States	349	35.9%
2	China	312	32.1%
3	Germany	79	8.1%
4	Japan	50	5.1%
5	Italy	24	2.5%
6	Ukraine	20	2.1%
7	Hong Kong	14	1.4%
8	France	13	1.3%
9	Singapore	13	1.3%
10	Netherlands	12	1.2%
11	Korea, Republic of	12	1.2%
12	Canada	11	1.1%
13		11	1.1%
14	Taiwan	7	0.7%
15	United Kingdom	6	0.6%
16	Viet Nam	5	0.5%
17	Australia	4	0.4%
18	India	4	0.4%
19	Iran, Islamic Republic of	3	0.3%
20	Ethiopia	3	0.3%
21	Turkey	3	0.3%
22	Sweden	2	0.2%
23	Nigeria	2	0.2%
24	Pakistan	2	0.2%
25	Russia	2	0.2%
26	Cyprus	2	0.2%
27	Egypt	2	0.2%
28	Brazil	2	0.2%
29	Argentina	2	0.2%
30	Mongolia	1	0.1%
31	Switzerland	1	0.1%