Rank	Countries/Territories	Count	Percent
1	United States	177	33.5%
2	China	165	31.2%
3	Germany	43	8.1%
4	United Kingdom	19	3.6%
5	Japan	18	3.4%
6	Singapore	12	2.3%
7	Brazil	9	1.7%
8	Ireland	8	1.5%
9	India	7	1.3%
10	Mongolia	6	1.1%
11	Australia	6	1.1%
12	Saudi Arabia	6	1.1%
13	Romania	6	1.1%
14	Taiwan	5	0.9%
15	France	5	0.9%
16	Netherlands	4	0.8%
17	Ukraine	4	0.8%
18	South Africa	3	0.6%
19	Norway	3	0.6%
20	Argentina	3	0.6%
21	Canada	3	0.6%
22	Cyprus	3	0.6%
23	Indonesia	2	0.4%
24	Philippines	2	0.4%
25	Russia	2	0.4%
26	Korea, Republic of	2	0.4%
27	Lithuania	1	0.2%
28	Iran, Islamic Republic of	1	0.2%
29	Oman	1	0.2%
30	Fiji	1	0.2%
31	Greece	1	0.2%