Rank	Countries/Territories	Count	Percent
1	United States	538	40%
2	China	341	25.4%
3	Germany	113	8.4%
4	Czech Republic	43	3.2%
5	United Kingdom	38	2.8%
6	Canada	23	1.7%
7	Japan	23	1.7%
8	Singapore	22	1.6%
9	France	21	1.6%
10	Korea, Republic of	16	1.2%
11	Netherlands	15	1.1%
12	Australia	12	0.9%
13	Ukraine	12	0.9%
14	Thailand	10	0.7%
15	Belgium	10	0.7%
16	Peru	10	0.7%
17	Ireland	9	0.7%
18	India	9	0.7%
19	Italy	7	0.5%
20	Kenya	7	0.5%
21	Saudi Arabia	7	0.5%
22	Iran, Islamic Republic of	5	0.4%
23	Romania	4	0.3%
24	Maldives	4	0.3%
25	Cyprus	4	0.3%
26	Brazil	4	0.3%
27	Argentina	3	0.2%
28	Russia	3	0.2%
29	Latvia	3	0.2%
30	Turkey	3	0.2%
31	Switzerland	2	0.1%
32	Slovakia	2	0.1%
33	Spain	2	0.1%
34	Mexico	2	0.1%
35	Bangladesh	2	0.1%
36	Egypt	2	0.1%
37	Indonesia	2	0.1%
38	Hong Kong	1	0.1%
39	Ethiopia	1	0.1%
40	Austria	1	0.1%
41	Chile	1	0.1%
42	Mongolia	1	0.1%
43	Norway	1	0.1%
44	Philippines	1	0.1%
45	Malaysia	1	0.1%
46	Sri Lanka	1	0.1%
47	Uganda	1	0.1%
48	Viet Nam	1	0.1%