Rank	Countries/Territories	Count	Percent
1	United States	207	41.2%
2	China	137	27.2%
3	Germany	46	9.1%
4	France	24	4.8%
5	Serbia	15	3%
6	Norway	14	2.8%
7	Japan	7	1.4%
8	Ireland	6	1.2%
9	Cyprus	5	1%
10	India	4	0.8%
11	Brazil	4	0.8%
12	Singapore	4	0.8%
13	Netherlands	3	0.6%
14	Iran, Islamic Republic of	2	0.4%
15	Korea, Republic of	2	0.4%
16	Mongolia	2	0.4%
17	Morocco	2	0.4%
18	Canada	2	0.4%
19	Argentina	2	0.4%
20	Armenia	2	0.4%
21	Finland	2	0.4%
22	Romania	2	0.4%
23	Russia	2	0.4%
24	United Kingdom	2	0.4%
25	Taiwan	2	0.4%
26	Tanzania, United Republic of	1	0.2%
27	Sweden	1	0.2%
28	Indonesia	1	0.2%