Rank	Countries/Territories	Count	Percent
1	United States	244	24.2%
2	China	243	24.1%
3	Germany	78	7.7%
4	Canada	43	4.3%
5	United Kingdom	37	3.7%
6	India	28	2.8%
7	Japan	27	2.7%
8	Romania	24	2.4%
9	Netherlands	19	1.9%
10	Bulgaria	17	1.7%
11	Australia	15	1.5%
12	Korea, Republic of	14	1.4%
13	Turkey	14	1.4%
14	Virgin Islands, British	11	1.1%
15	Ireland	11	1.1%
16	Egypt	10	1%
17	France	10	1%
18	Greece	9	0.9%
19	Hong Kong	9	0.9%
20	Russia	8	0.8%
21	Sri Lanka	8	0.8%
22	Sweden	7	0.7%
23	Taiwan	7	0.7%
24	Poland	7	0.7%
25	Singapore	7	0.7%
26	Malaysia	7	0.7%
27	Pakistan	6	0.6%
28	New Zealand	5	0.5%
29	Cyprus	5	0.5%
30	Ukraine	5	0.5%
31	United Arab Emirates	5	0.5%
32	South Africa	5	0.5%
33	Uzbekistan	5	0.5%
34	Italy	4	0.4%
35	Iran, Islamic Republic of	4	0.4%
36	Bahrain	4	0.4%
37	Belgium	4	0.4%
38	Colombia	4	0.4%
39	Namibia	4	0.4%
40	Norway	4	0.4%
41	Philippines	3	0.3%
42	Nigeria	3	0.3%
43	Israel	2	0.2%
44	Brazil	2	0.2%
45	Denmark	2	0.2%
46	Georgia	2	0.2%
47	Thailand	2	0.2%
48	Viet Nam	2	0.2%
49	Slovenia	1	0.1%
50	Saudi Arabia	1	0.1%
51	Zimbabwe	1	0.1%
52	Iraq	1	0.1%
53	Croatia	1	0.1%
54	Mongolia	1	0.1%
55	Kyrgyzstan	1	0.1%
56	Luxembourg	1	0.1%
57	Macao	1	0.1%
58	Nepal	1	0.1%
59	Oman	1	0.1%