Rank	Countries/Territories	Count	Percent
1	United States	577	48.7%
2	China	226	19.1%
3	Germany	118	9.9%
4	Canada	42	3.5%
5	Japan	29	2.4%
6	Denmark	23	1.9%
7	Korea, Republic of	22	1.9%
8	Pakistan	21	1.8%
9	Russia	17	1.4%
10	Netherlands	16	1.3%
11	Hong Kong	13	1.1%
12	Cyprus	10	0.8%
13	Singapore	8	0.7%
14	Taiwan	7	0.6%
15	France	7	0.6%
16	Ireland	5	0.4%
17	Israel	4	0.3%
18	Iran, Islamic Republic of	4	0.3%
19	Argentina	4	0.3%
20	Australia	4	0.3%
21	Slovakia	4	0.3%
22	Spain	4	0.3%
23	Portugal	3	0.3%
24	United Kingdom	3	0.3%
25	Ukraine	2	0.2%
26	Viet Nam	2	0.2%
27	Norway	2	0.2%
28	India	2	0.2%
29	Iraq	2	0.2%
30	Mexico	2	0.2%
31	Mongolia	1	0.1%
32	Jordan	1	0.1%
33	Bangladesh	1	0.1%