Rank	Countries/Territories	Count	Percent
1	United States	254	42.4%
2	China	172	28.7%
3	Germany	85	14.2%
4	Argentina	12	2%
5	Japan	11	1.8%
6	Netherlands	9	1.5%
7	Ireland	9	1.5%
8	France	7	1.2%
9	Cyprus	5	0.8%
10	India	4	0.7%
11	Sweden	3	0.5%
12	Taiwan	3	0.5%
13	Thailand	2	0.3%
14	Turkey	2	0.3%
15	Ukraine	2	0.3%
16	Viet Nam	2	0.3%
17	Singapore	2	0.3%
18	Iran, Islamic Republic of	2	0.3%
19	Puerto Rico	2	0.3%
20	Malaysia	2	0.3%
21	Moldova, Republic of	2	0.3%
22	Mongolia	1	0.2%
23	Korea, Republic of	1	0.2%
24	Saudi Arabia	1	0.2%
25	Oman	1	0.2%
26	Australia	1	0.2%
27	Switzerland	1	0.2%
28	United Arab Emirates	1	0.2%