Rank	Countries/Territories	Count	Percent
1	United States	540	45.9%
2	China	342	29.1%
3	Germany	114	9.7%
4	Japan	33	2.8%
5	Canada	31	2.6%
6	France	29	2.5%
7	Singapore	13	1.1%
8	South Africa	9	0.8%
9	India	9	0.8%
10	Nepal	7	0.6%
11	Netherlands	7	0.6%
12	Cyprus	7	0.6%
13	Australia	4	0.3%
14	Hong Kong	4	0.3%
15	Norway	3	0.3%
16	Korea, Republic of	3	0.3%
17	Mongolia	3	0.3%
18	Viet Nam	3	0.3%
19	Ukraine	2	0.2%
20	Sweden	2	0.2%
21	Switzerland	2	0.2%
22	Lithuania	2	0.2%
23	Malaysia	2	0.2%
24	Argentina	2	0.2%
25	Ireland	1	0.1%
26	Syrian Arab Republic	1	0.1%
27	Taiwan	1	0.1%
28	Spain	1	0.1%