Rank	Countries/Territories	Count	Percent
1	United States	345	27.6%
2	China	318	25.4%
3	Germany	145	11.6%
4	India	104	8.3%
5	Japan	54	4.3%
6	United Kingdom	29	2.3%
7	Egypt	23	1.8%
8	Brazil	21	1.7%
9	Netherlands	20	1.6%
10	Australia	18	1.4%
11	Canada	15	1.2%
12	Ireland	14	1.1%
13	France	13	1%
14		12	1%
15	Singapore	12	1%
16	Cyprus	11	0.9%
17	Pakistan	10	0.8%
18	Iran, Islamic Republic of	9	0.7%
19	Korea, Republic of	8	0.6%
20	Hong Kong	8	0.6%
21	Norway	8	0.6%
22	Nigeria	7	0.6%
23	Taiwan	6	0.5%
24	Argentina	5	0.4%
25	Philippines	4	0.3%
26	Mongolia	4	0.3%
27	Czech Republic	3	0.2%
28	Colombia	2	0.2%
29	Romania	2	0.2%
30	Libya	2	0.2%
31	Iraq	2	0.2%
32	Indonesia	2	0.2%
33	Tanzania, United Republic of	2	0.2%
34	Ukraine	2	0.2%
35	Turkey	1	0.1%
36	Switzerland	1	0.1%
37	Viet Nam	1	0.1%
38	Israel	1	0.1%
39	Italy	1	0.1%
40	Jordan	1	0.1%
41	Russia	1	0.1%
42	Algeria	1	0.1%
43	Bangladesh	1	0.1%
44	Ecuador	1	0.1%
45	Ghana	1	0.1%