Rank	Countries/Territories	Count	Percent
1	United States	142	37.5%
2	China	60	15.8%
3	Germany	42	11.1%
4	Japan	20	5.3%
5	Canada	14	3.7%
6	India	8	2.1%
7	Italy	8	2.1%
8	Russia	7	1.8%
9	Netherlands	6	1.6%
10	Korea, Republic of	6	1.6%
11	Ireland	6	1.6%
12	Bulgaria	6	1.6%
13	Singapore	5	1.3%
14	Spain	4	1.1%
15	Taiwan	4	1.1%
16	Cyprus	4	1.1%
17	Czech Republic	4	1.1%
18	France	4	1.1%
19	Georgia	3	0.8%
20	Australia	3	0.8%
21	Mexico	3	0.8%
22	Romania	3	0.8%
23	Norway	3	0.8%
24	Oman	2	0.5%
25	Portugal	2	0.5%
26	Iran, Islamic Republic of	2	0.5%
27	Belgium	2	0.5%
28	Bangladesh	1	0.3%
29	Malaysia	1	0.3%
30	United Kingdom	1	0.3%
31	Viet Nam	1	0.3%
32	Philippines	1	0.3%
33	Switzerland	1	0.3%