Rank	Countries/Territories	Count	Percent
1	United States	133	32.4%
2	Germany	54	13.2%
3	China	48	11.7%
4	Oman	24	5.9%
5	Canada	19	4.6%
6	Poland	17	4.1%
7	Netherlands	16	3.9%
8	Spain	14	3.4%
9	United Kingdom	13	3.2%
10	Japan	9	2.2%
11	Norway	6	1.5%
12	Singapore	5	1.2%
13	Argentina	5	1.2%
14	Cyprus	5	1.2%
15	Estonia	5	1.2%
16	France	4	1%
17	Denmark	3	0.7%
18	Australia	3	0.7%
19	Greece	3	0.7%
20	India	3	0.7%
21	Turkey	3	0.7%
22	Saudi Arabia	2	0.5%
23	Hong Kong	2	0.5%
24	Mongolia	2	0.5%
25	New Zealand	2	0.5%
26	Nigeria	2	0.5%
27	Brazil	2	0.5%
28	Belgium	1	0.2%
29	Georgia	1	0.2%
30	Iran, Islamic Republic of	1	0.2%
31	Serbia	1	0.2%
32	Russia	1	0.2%
33	Philippines	1	0.2%