Rank	Countries/Territories	Count	Percent
1	United States	401	43.2%
2	China	279	30%
3	Germany	80	8.6%
4	Russia	18	1.9%
5	Japan	15	1.6%
6	Canada	14	1.5%
7	Taiwan	13	1.4%
8	Korea, Republic of	12	1.3%
9	Netherlands	10	1.1%
10	Singapore	9	1%
11	France	8	0.9%
12	Australia	7	0.8%
13	United Kingdom	7	0.8%
14	Peru	6	0.6%
15	Ireland	6	0.6%
16	Italy	5	0.5%
17	Indonesia	4	0.4%
18	Cyprus	4	0.4%
19	Turkey	4	0.4%
20	Ukraine	3	0.3%
21	Romania	3	0.3%
22	Argentina	3	0.3%
23	Austria	3	0.3%
24	Brazil	2	0.2%
25	Finland	2	0.2%
26	India	2	0.2%
27	Malaysia	2	0.2%
28	Mongolia	1	0.1%
29	Philippines	1	0.1%
30	Nigeria	1	0.1%
31	Norway	1	0.1%
32	Iran, Islamic Republic of	1	0.1%
33	Israel	1	0.1%
34	Bulgaria	1	0.1%