Rank	Countries/Territories	Count	Percent
1	United States	171	24.6%
2	China	151	21.7%
3	Australia	87	12.5%
4	Switzerland	76	10.9%
5	Italy	51	7.3%
6	Germany	49	7.1%
7	Japan	12	1.7%
8	India	12	1.7%
9	Korea, Republic of	9	1.3%
10	Russia	7	1%
11	Senegal	6	0.9%
12	Afghanistan	6	0.9%
13	Canada	5	0.7%
14	France	5	0.7%
15	Israel	5	0.7%
16	United Kingdom	4	0.6%
17	Norway	4	0.6%
18	Mongolia	3	0.4%
19	Netherlands	3	0.4%
20	Hong Kong	3	0.4%
21	Denmark	2	0.3%
22	Egypt	2	0.3%
23	Pakistan	2	0.3%
24	Poland	2	0.3%
25	Romania	2	0.3%
26	Singapore	2	0.3%
27	Trinidad and Tobago	2	0.3%
28	Ukraine	1	0.1%
29	Slovakia	1	0.1%
30	Sweden	1	0.1%
31	Saudi Arabia	1	0.1%
32	Thailand	1	0.1%
33	Palestine, State of	1	0.1%
34	Ireland	1	0.1%
35	Cyprus	1	0.1%
36	Czech Republic	1	0.1%
37	Argentina	1	0.1%
38	Belgium	1	0.1%
39	Mexico	1	0.1%