Rank	Countries/Territories	Count	Percent
1	United States	368	39.7%
2	China	211	22.8%
3	Germany	70	7.6%
4	Japan	52	5.6%
5	Russia	33	3.6%
6	Singapore	26	2.8%
7	Canada	16	1.7%
8	France	14	1.5%
9	Malta	12	1.3%
10	Netherlands	12	1.3%
11	Iran, Islamic Republic of	9	1%
12	Argentina	9	1%
13	United Kingdom	9	1%
14	Australia	8	0.9%
15	Finland	7	0.8%
16	Spain	7	0.8%
17	Cyprus	6	0.6%
18	Turkey	6	0.6%
19	Greece	5	0.5%
20	Italy	4	0.4%
21	Norway	4	0.4%
22	Poland	4	0.4%
23	Romania	4	0.4%
24	Kazakhstan	3	0.3%
25	Tanzania, United Republic of	3	0.3%
26	Brazil	3	0.3%
27	Denmark	2	0.2%
28	Austria	2	0.2%
29	India	2	0.2%
30	Ireland	2	0.2%
31	Thailand	2	0.2%
32	Morocco	2	0.2%
33	Korea, Republic of	1	0.1%
34	Portugal	1	0.1%
35	Philippines	1	0.1%
36	Saudi Arabia	1	0.1%
37	Serbia	1	0.1%
38	Switzerland	1	0.1%
39	Taiwan	1	0.1%
40	Hungary	1	0.1%
41	Bosnia and Herzegovina	1	0.1%