Rank	Countries/Territories	Count	Percent
1	United States	479	46.1%
2	China	221	21.3%
3	Germany	106	10.2%
4	Japan	30	2.9%
5	Taiwan	29	2.8%
6	Netherlands	23	2.2%
7	Ukraine	19	1.8%
8	Canada	17	1.6%
9	Ireland	16	1.5%
10	France	12	1.2%
11	India	11	1.1%
12	Korea, Republic of	9	0.9%
13	Singapore	9	0.9%
14	Italy	8	0.8%
15	Bulgaria	7	0.7%
16	South Africa	6	0.6%
17	United Kingdom	5	0.5%
18	Norway	4	0.4%
19	Romania	3	0.3%
20	Cyprus	3	0.3%
21	Argentina	2	0.2%
22	Australia	2	0.2%
23	Israel	2	0.2%
24	Russia	2	0.2%
25	Oman	2	0.2%
26	Thailand	2	0.2%
27	Turkey	2	0.2%
28	Poland	2	0.2%
29	Palestine, State of	1	0.1%
30	Philippines	1	0.1%
31	Spain	1	0.1%
32	Belgium	1	0.1%
33	Brazil	1	0.1%