Rank	Countries/Territories	Count	Percent
1	United States	220	24.4%
2	China	205	22.7%
3	Germany	78	8.6%
4	Canada	42	4.7%
5	United Kingdom	31	3.4%
6	Japan	27	3%
7	India	25	2.8%
8	Romania	24	2.7%
9	Bulgaria	17	1.9%
10	Korea, Republic of	14	1.6%
11	Netherlands	14	1.6%
12	Australia	13	1.4%
13	Turkey	13	1.4%
14	Ireland	11	1.2%
15	Egypt	10	1.1%
16	France	9	1%
17	Greece	9	1%
18	Hong Kong	9	1%
19	Sri Lanka	8	0.9%
20	Sweden	7	0.8%
21	Taiwan	7	0.8%
22	Singapore	7	0.8%
23	Poland	7	0.8%
24	Malaysia	7	0.8%
25	Pakistan	6	0.7%
26	Russia	6	0.7%
27	South Africa	5	0.6%
28	Ukraine	5	0.6%
29	United Arab Emirates	5	0.6%
30	Uzbekistan	5	0.6%
31	New Zealand	5	0.6%
32	Namibia	4	0.4%
33	Italy	4	0.4%
34	Norway	4	0.4%
35	Iran, Islamic Republic of	4	0.4%
36	Bahrain	4	0.4%
37	Belgium	4	0.4%
38	Cyprus	3	0.3%
39	Nigeria	3	0.3%
40	Israel	2	0.2%
41	Denmark	2	0.2%
42	Georgia	2	0.2%
43	Brazil	2	0.2%
44	Viet Nam	2	0.2%
45	Thailand	2	0.2%
46	Saudi Arabia	1	0.1%
47	Slovenia	1	0.1%
48	Zimbabwe	1	0.1%
49	Croatia	1	0.1%
50	Iraq	1	0.1%
51	Mongolia	1	0.1%
52	Kyrgyzstan	1	0.1%
53	Macao	1	0.1%
54	Nepal	1	0.1%
55	Oman	1	0.1%