Rank	Countries/Territories	Count	Percent
1	United States	570	40.3%
2	China	441	31.2%
3	Germany	119	8.4%
4	Canada	55	3.9%
5	France	34	2.4%
6	Spain	29	2.1%
7	Netherlands	23	1.6%
8	Japan	19	1.3%
9	Russia	18	1.3%
10	Singapore	11	0.8%
11	Romania	11	0.8%
12	Korea, Republic of	11	0.8%
13	Ireland	9	0.6%
14	United Kingdom	7	0.5%
15	Poland	6	0.4%
16	Portugal	6	0.4%
17	Hong Kong	6	0.4%
18	India	6	0.4%
19	Australia	6	0.4%
20	Cyprus	4	0.3%
21	Argentina	3	0.2%
22	Mongolia	3	0.2%
23	South Africa	3	0.2%
24	Thailand	2	0.1%
25	Slovakia	2	0.1%
26	Viet Nam	2	0.1%
27	Belgium	2	0.1%
28	Brazil	2	0.1%
29	Guatemala	2	0.1%
30	Philippines	1	0.1%