Rank	Countries/Territories	Count	Percent
1	United States	310	47.9%
2	China	163	25.2%
3	Germany	44	6.8%
4	Japan	20	3.1%
5	Canada	12	1.9%
6	United Kingdom	11	1.7%
7	Korea, Republic of	8	1.2%
8	Spain	7	1.1%
9	France	7	1.1%
10	Kazakhstan	6	0.9%
11	Singapore	6	0.9%
12	Netherlands	5	0.8%
13	Hong Kong	5	0.8%
14	Hungary	4	0.6%
15	Iran, Islamic Republic of	4	0.6%
16	Cyprus	4	0.6%
17	Denmark	3	0.5%
18	Colombia	3	0.5%
19	Greece	3	0.5%
20	Switzerland	3	0.5%
21	Taiwan	2	0.3%
22	Romania	2	0.3%
23	Russia	2	0.3%
24	Lebanon	2	0.3%
25	Argentina	2	0.3%
26	Australia	2	0.3%
27	Egypt	2	0.3%
28	Brazil	1	0.2%
29	Ireland	1	0.2%
30	Italy	1	0.2%
31	Pakistan	1	0.2%
32	Portugal	1	0.2%