Rank	Countries/Territories	Count	Percent
1	United States	294	45.4%
2	China	156	24.1%
3	Germany	45	7%
4	Greece	18	2.8%
5	France	16	2.5%
6	Sweden	14	2.2%
7	Denmark	12	1.9%
8	Iran, Islamic Republic of	9	1.4%
9	Cyprus	8	1.2%
10	Russia	7	1.1%
11	Singapore	6	0.9%
12	Netherlands	6	0.9%
13	Norway	6	0.9%
14	Canada	6	0.9%
15	Brazil	5	0.8%
16	Palestine, State of	4	0.6%
17	United Kingdom	4	0.6%
18	Japan	3	0.5%
19	Ireland	3	0.5%
20	India	3	0.5%
21	Israel	2	0.3%
22	Italy	2	0.3%
23	Bulgaria	2	0.3%
24	Korea, Republic of	2	0.3%
25	Malaysia	2	0.3%
26	Mexico	2	0.3%
27	Peru	2	0.3%
28	Taiwan	2	0.3%
29	Ukraine	2	0.3%
30	United Arab Emirates	1	0.2%
31	Argentina	1	0.2%
32	Austria	1	0.2%
33	Guatemala	1	0.2%