Rank	Countries/Territories	Count	Percent
1	United States	538	37%
2	China	431	29.6%
3	Germany	145	10%
4	France	48	3.3%
5	Netherlands	38	2.6%
6	Canada	36	2.5%
7	Russia	27	1.9%
8	Japan	24	1.6%
9	Taiwan	16	1.1%
10	Romania	14	1%
11	India	14	1%
12	United Kingdom	12	0.8%
13	Ireland	11	0.8%
14	Sweden	10	0.7%
15	Singapore	8	0.5%
16	Korea, Republic of	8	0.5%
17	Costa Rica	7	0.5%
18	Australia	7	0.5%
19	Finland	6	0.4%
20	Cyprus	5	0.3%
21	Ukraine	5	0.3%
22	Thailand	3	0.2%
23	Belgium	3	0.2%
24	Brazil	3	0.2%
25	Iran, Islamic Republic of	3	0.2%
26	Spain	3	0.2%
27	Norway	3	0.2%
28	Portugal	2	0.1%
29	Saudi Arabia	2	0.1%
30	Mongolia	2	0.1%
31	Malaysia	2	0.1%
32	Israel	2	0.1%
33	Cambodia	2	0.1%
34	Switzerland	2	0.1%
35	Turkey	1	0.1%
36	Viet Nam	1	0.1%
37	Bangladesh	1	0.1%
38	Denmark	1	0.1%
39	Ethiopia	1	0.1%
40	Italy	1	0.1%
41	Iraq	1	0.1%
42	Hong Kong	1	0.1%
43	Malta	1	0.1%
44	Mauritius	1	0.1%
45	Lebanon	1	0.1%
46	Kenya	1	0.1%
47	Serbia	1	0.1%
48	Oman	1	0.1%