Rank	Countries/Territories	Count	Percent
1	United States	258	38.9%
2	China	220	33.1%
3	Germany	84	12.7%
4	Iran, Islamic Republic of	12	1.8%
5	Japan	12	1.8%
6	Netherlands	10	1.5%
7	Canada	9	1.4%
8	Cyprus	8	1.2%
9	Korea, Republic of	7	1.1%
10	Australia	6	0.9%
11		6	0.9%
12	Singapore	6	0.9%
13	Hong Kong	4	0.6%
14	Ireland	3	0.5%
15	Mongolia	3	0.5%
16	Argentina	3	0.5%
17	Russia	3	0.5%
18	United Kingdom	2	0.3%
19	South Africa	2	0.3%
20	France	2	0.3%
21	Colombia	1	0.2%
22	Norway	1	0.2%
23	India	1	0.2%
24	Switzerland	1	0.2%