Rank	Countries/Territories	Count	Percent
1	United States	641	37.1%
2	China	479	27.8%
3	Germany	161	9.3%
4	Australia	68	3.9%
5	Japan	34	2%
6	Netherlands	33	1.9%
7	France	28	1.6%
8		27	1.6%
9	India	24	1.4%
10	Iran, Islamic Republic of	24	1.4%
11	Canada	23	1.3%
12	Ukraine	23	1.3%
13	Singapore	22	1.3%
14	United Kingdom	15	0.9%
15	Bulgaria	13	0.8%
16	Korea, Republic of	12	0.7%
17	Indonesia	11	0.6%
18	Argentina	10	0.6%
19	Sweden	10	0.6%
20	Hong Kong	8	0.5%
21	Cyprus	7	0.4%
22	Egypt	7	0.4%
23	Malaysia	5	0.3%
24	Latvia	4	0.2%
25	South Africa	4	0.2%
26	Spain	3	0.2%
27	Mongolia	3	0.2%
28	Russia	3	0.2%
29	Serbia	2	0.1%
30	Qatar	2	0.1%
31	Pakistan	2	0.1%
32	Mexico	2	0.1%
33	Greece	2	0.1%
34	Thailand	2	0.1%
35	Uganda	1	0.1%
36	Switzerland	1	0.1%
37	Tanzania, United Republic of	1	0.1%
38	Sri Lanka	1	0.1%
39	Ghana	1	0.1%
40	Iraq	1	0.1%
41	Brazil	1	0.1%
42	Kuwait	1	0.1%
43	Kazakhstan	1	0.1%
44	Philippines	1	0.1%
45	Portugal	1	0.1%
46	Romania	1	0.1%