Rank	Countries/Territories	Count	Percent
1	United States	271	37.3%
2	China	258	35.5%
3	Germany	69	9.5%
4	Japan	15	2.1%
5	France	8	1.1%
6	Netherlands	8	1.1%
7	Russia	7	1%
8	Switzerland	7	1%
9	Cyprus	7	1%
10	Australia	7	1%
11	Greece	6	0.8%
12	Iran, Islamic Republic of	6	0.8%
13	Italy	6	0.8%
14	United Kingdom	6	0.8%
15	Singapore	5	0.7%
16	India	5	0.7%
17	Canada	5	0.7%
18		4	0.6%
19	Denmark	4	0.6%
20	Korea, Republic of	3	0.4%
21	Mongolia	3	0.4%
22	Nepal	2	0.3%
23	Spain	2	0.3%
24	Taiwan	2	0.3%
25	Argentina	2	0.3%
26	Kenya	2	0.3%
27	Ireland	1	0.1%
28	Austria	1	0.1%
29	Azerbaijan	1	0.1%
30	Egypt	1	0.1%
31	Sweden	1	0.1%
32	South Africa	1	0.1%
33	Norway	1	0.1%