Rank	Countries/Territories	Count	Percent
1	United States	446	44%
2	China	313	30.9%
3	Germany	80	7.9%
4	India	29	2.9%
5	Japan	19	1.9%
6	South Africa	15	1.5%
7	Netherlands	14	1.4%
8	Singapore	13	1.3%
9	Czech Republic	10	1%
10	France	10	1%
11	Ireland	8	0.8%
12	Korea, Republic of	6	0.6%
13	Iraq	6	0.6%
14	Russia	5	0.5%
15	Turkey	4	0.4%
16	Thailand	3	0.3%
17	Canada	3	0.3%
18	Chile	3	0.3%
19	Cyprus	2	0.2%
20	Kazakhstan	2	0.2%
21	Ukraine	2	0.2%
22	United Kingdom	2	0.2%
23	Zambia	2	0.2%
24	Mongolia	2	0.2%
25	Palestine, State of	2	0.2%
26	Philippines	2	0.2%
27	Portugal	1	0.1%
28	Romania	1	0.1%
29	Saudi Arabia	1	0.1%
30	Switzerland	1	0.1%
31	Latvia	1	0.1%
32	Lithuania	1	0.1%
33	Hong Kong	1	0.1%
34	Argentina	1	0.1%
35	Australia	1	0.1%
36	Bulgaria	1	0.1%