Rank	Countries/Territories	Count	Percent
1	United States	290	36%
2	China	168	20.8%
3	Germany	128	15.9%
4	Japan	53	6.6%
5	Singapore	18	2.2%
6	Switzerland	15	1.9%
7	Canada	15	1.9%
8	France	13	1.6%
9	Netherlands	13	1.6%
10	Sweden	11	1.4%
11	Spain	10	1.2%
12	Romania	9	1.1%
13	Brazil	7	0.9%
14	Russia	6	0.7%
15	United Kingdom	5	0.6%
16	India	5	0.6%
17	Mexico	4	0.5%
18	Pakistan	4	0.5%
19	Korea, Republic of	3	0.4%
20	Ireland	3	0.4%
21	Cyprus	3	0.4%
22	Denmark	3	0.4%
23	Egypt	3	0.4%
24	Bulgaria	2	0.2%
25	Argentina	2	0.2%
26	Australia	2	0.2%
27	Israel	2	0.2%
28	Italy	2	0.2%
29	Iran, Islamic Republic of	2	0.2%
30	Philippines	2	0.2%
31	Serbia	1	0.1%
32	Turkey	1	0.1%
33	Hong Kong	1	0.1%