Rank	Countries/Territories	Count	Percent
1	United States	291	33.6%
2	China	268	30.9%
3	Germany	140	16.1%
4	Japan	35	4%
5	France	18	2.1%
6	Switzerland	14	1.6%
7	Russia	14	1.6%
8	Ireland	12	1.4%
9	Netherlands	11	1.3%
10	Singapore	7	0.8%
11	Canada	6	0.7%
12	Cyprus	6	0.7%
13	Korea, Republic of	6	0.7%
14	India	6	0.7%
15	Indonesia	5	0.6%
16	Denmark	5	0.6%
17	Qatar	4	0.5%
18	South Africa	2	0.2%
19	Sweden	2	0.2%
20	Saudi Arabia	2	0.2%
21	Ukraine	2	0.2%
22	Egypt	2	0.2%
23	Argentina	2	0.2%
24	Iran, Islamic Republic of	2	0.2%
25	Malaysia	1	0.1%
26	Mongolia	1	0.1%
27	Australia	1	0.1%
28	Norway	1	0.1%
29	Peru	1	0.1%