Rank	Countries/Territories	Count	Percent
1	United States	661	41.3%
2	China	526	32.9%
3	Germany	135	8.4%
4	Norway	52	3.2%
5	France	45	2.8%
6	Japan	35	2.2%
7	Russia	18	1.1%
8	Netherlands	15	0.9%
9	Canada	15	0.9%
10	Australia	13	0.8%
11	Singapore	11	0.7%
12	Switzerland	9	0.6%
13	Iran, Islamic Republic of	9	0.6%
14	India	6	0.4%
15	Cyprus	6	0.4%
16	Hong Kong	4	0.2%
17	Malaysia	4	0.2%
18	Thailand	4	0.2%
19	Ukraine	4	0.2%
20	United Kingdom	4	0.2%
21	Saudi Arabia	4	0.2%
22	Latvia	3	0.2%
23	Taiwan	3	0.2%
24	Bulgaria	3	0.2%
25	Argentina	2	0.1%
26	Viet Nam	2	0.1%
27	South Africa	2	0.1%
28	Sweden	2	0.1%
29	Slovakia	1	0.1%
30	Chile	1	0.1%
31	Mexico	1	0.1%
32	Kenya	1	0.1%