Rank	Countries/Territories	Count	Percent
1	United States	332	30.7%
2	China	216	20%
3	Japan	143	13.2%
4	Germany	56	5.2%
5	Singapore	27	2.5%
6	Norway	25	2.3%
7	France	20	1.9%
8	Russia	20	1.9%
9	Italy	17	1.6%
10	United Kingdom	16	1.5%
11	Korea, Republic of	15	1.4%
12	Netherlands	13	1.2%
13	Canada	13	1.2%
14	Iran, Islamic Republic of	12	1.1%
15	Spain	12	1.1%
16	Switzerland	10	0.9%
17	Taiwan	10	0.9%
18	India	10	0.9%
19	Romania	9	0.8%
20	Ukraine	8	0.7%
21	Lithuania	7	0.6%
22	Nigeria	6	0.6%
23	Egypt	6	0.6%
24	Cyprus	6	0.6%
25	Denmark	5	0.5%
26	Australia	5	0.5%
27	Guatemala	5	0.5%
28	Hungary	4	0.4%
29	Greece	4	0.4%
30	Indonesia	4	0.4%
31	Ireland	4	0.4%
32	Slovenia	4	0.4%
33	Poland	3	0.3%
34	Hong Kong	3	0.3%
35	Colombia	3	0.3%
36	Austria	2	0.2%
37	Brazil	2	0.2%
38	Malaysia	2	0.2%
39	Mexico	2	0.2%
40	New Zealand	2	0.2%
41	Saudi Arabia	2	0.2%
42	Venezuela, Bolivarian Republic of	2	0.2%
43	Turkey	2	0.2%
44	Sri Lanka	2	0.2%
45	Sweden	2	0.2%
46	Thailand	1	0.1%
47	Tunisia	1	0.1%
48	Nicaragua	1	0.1%
49	Pakistan	1	0.1%
50	Lebanon	1	0.1%
51	Algeria	1	0.1%
52	Belgium	1	0.1%
53	Iceland	1	0.1%