Rank	Countries/Territories	Count	Percent
1	United States	503	39.1%
2	China	404	31.4%
3	Germany	105	8.2%
4	India	31	2.4%
5	France	20	1.6%
6	Canada	19	1.5%
7	Korea, Republic of	16	1.2%
8	United Kingdom	15	1.2%
9	Mexico	13	1%
10	Japan	12	0.9%
11	Singapore	12	0.9%
12	Taiwan	12	0.9%
13	Netherlands	10	0.8%
14	Iran, Islamic Republic of	9	0.7%
15	Ireland	8	0.6%
16	Hong Kong	7	0.5%
17	Egypt	7	0.5%
18	South Africa	6	0.5%
19	Spain	6	0.5%
20	Greece	5	0.4%
21	Belgium	5	0.4%
22	Brazil	4	0.3%
23	Australia	4	0.3%
24	Colombia	4	0.3%
25	Italy	4	0.3%
26	Pakistan	4	0.3%
27	Uzbekistan	4	0.3%
28	Switzerland	3	0.2%
29	Russia	3	0.2%
30	Nepal	3	0.2%
31	Jordan	3	0.2%
32	Cyprus	3	0.2%
33	Israel	2	0.2%
34	Serbia	2	0.2%
35	Sweden	2	0.2%
36	Viet Nam	2	0.2%
37	Ukraine	1	0.1%
38	Sri Lanka	1	0.1%
39	Slovenia	1	0.1%
40	Palestine, State of	1	0.1%
41	Portugal	1	0.1%
42	Norway	1	0.1%
43	Macao	1	0.1%
44	Indonesia	1	0.1%
45	Austria	1	0.1%
46	Bangladesh	1	0.1%
47	Algeria	1	0.1%
48	Argentina	1	0.1%
49	Bosnia and Herzegovina	1	0.1%