Rank	Countries/Territories	Count	Percent
1	United States	226	27.9%
2	China	211	26%
3	Germany	97	12%
4	India	41	5.1%
5	Korea, Republic of	32	4%
6	Greece	24	3%
7	Romania	22	2.7%
8	Japan	13	1.6%
9	Singapore	12	1.5%
10	Italy	12	1.5%
11	Australia	12	1.5%
12	France	11	1.4%
13	Denmark	10	1.2%
14	Canada	10	1.2%
15	Netherlands	10	1.2%
16	Russia	8	1%
17	United Kingdom	7	0.9%
18	Tunisia	6	0.7%
19	Turkey	5	0.6%
20	Taiwan	5	0.6%
21	Palestine, State of	4	0.5%
22	Hong Kong	4	0.5%
23	Hungary	3	0.4%
24	Israel	3	0.4%
25	Bulgaria	3	0.4%
26	Cyprus	3	0.4%
27	Portugal	3	0.4%
28	Norway	3	0.4%
29	New Zealand	1	0.1%
30	Latvia	1	0.1%
31	Mongolia	1	0.1%
32	Thailand	1	0.1%
33	Ukraine	1	0.1%
34	Sweden	1	0.1%
35	Belgium	1	0.1%
36	Brazil	1	0.1%
37	Iran, Islamic Republic of	1	0.1%
38	Ireland	1	0.1%