Rank	Countries/Territories	Count	Percent
1	United States	310	36.5%
2	China	246	28.9%
3	Germany	45	5.3%
4	Japan	38	4.5%
5	Canada	24	2.8%
6	India	19	2.2%
7	Korea, Republic of	17	2%
8	Netherlands	16	1.9%
9	Hong Kong	13	1.5%
10	France	11	1.3%
11	Singapore	11	1.3%
12	Switzerland	11	1.3%
13	Romania	9	1.1%
14	United Kingdom	8	0.9%
15	Nepal	8	0.9%
16	Ireland	7	0.8%
17	Brazil	6	0.7%
18	Mongolia	5	0.6%
19	Turkey	5	0.6%
20	Spain	5	0.6%
21	Indonesia	4	0.5%
22	Australia	3	0.4%
23	Cyprus	3	0.4%
24	Taiwan	3	0.4%
25	Thailand	3	0.4%
26	Palestine, State of	3	0.4%
27	Pakistan	2	0.2%
28	Italy	2	0.2%
29	Lithuania	2	0.2%
30	Malaysia	2	0.2%
31	Viet Nam	2	0.2%
32	Israel	1	0.1%
33	Dominican Republic	1	0.1%
34	New Zealand	1	0.1%
35	Oman	1	0.1%
36	Peru	1	0.1%
37	Russia	1	0.1%
38	Saudi Arabia	1	0.1%