Rank	Countries/Territories	Count	Percent
1	United States	124	30.8%
2	China	85	21.1%
3	Germany	52	12.9%
4	Switzerland	40	10%
5	Japan	22	5.5%
6	India	15	3.7%
7	Ukraine	13	3.2%
8	France	12	3%
9	Canada	6	1.5%
10	Korea, Republic of	6	1.5%
11	Singapore	6	1.5%
12	Netherlands	4	1%
13	Egypt	3	0.7%
14	Brazil	2	0.5%
15	Philippines	2	0.5%
16	South Africa	2	0.5%
17	Namibia	2	0.5%
18	Sweden	1	0.2%
19	Morocco	1	0.2%
20	Poland	1	0.2%
21	Russia	1	0.2%
22	Austria	1	0.2%
23	Ireland	1	0.2%