Rank	Countries/Territories	Count	Percent
1	United States	175	34.2%
2	China	162	31.7%
3	Germany	44	8.6%
4	Canada	24	4.7%
5	France	14	2.7%
6	Korea, Republic of	13	2.5%
7	Netherlands	10	2%
8	India	9	1.8%
9	Hong Kong	6	1.2%
10	Italy	6	1.2%
11	Denmark	6	1.2%
12	Australia	6	1.2%
13	Turkey	5	1%
14	Switzerland	3	0.6%
15	Iran, Islamic Republic of	3	0.6%
16	Singapore	3	0.6%
17	Slovenia	2	0.4%
18	Spain	2	0.4%
19	Saudi Arabia	2	0.4%
20	Austria	2	0.4%
21	Colombia	2	0.4%
22	Cyprus	2	0.4%
23	Ecuador	2	0.4%
24	Japan	2	0.4%
25	Indonesia	2	0.4%
26	Niger	1	0.2%
27	Egypt	1	0.2%
28	Burkina Faso	1	0.2%
29	Taiwan	1	0.2%