Rank	Countries/Territories	Count	Percent
1	United States	152	30.2%
2	China	147	29.2%
3	Germany	41	8.1%
4	South Africa	18	3.6%
5	Russia	16	3.2%
6	Turkey	13	2.6%
7	Japan	13	2.6%
8	France	12	2.4%
9	Singapore	12	2.4%
10	Netherlands	10	2%
11	Nigeria	6	1.2%
12	Korea, Republic of	6	1.2%
13	Iraq	6	1.2%
14	Argentina	6	1.2%
15	Bangladesh	6	1.2%
16	Mexico	4	0.8%
17	Bulgaria	4	0.8%
18	Ukraine	4	0.8%
19	United Kingdom	3	0.6%
20	India	3	0.6%
21	Iran, Islamic Republic of	3	0.6%
22	Colombia	3	0.6%
23	Cyprus	2	0.4%
24	Egypt	2	0.4%
25	Austria	2	0.4%
26	Norway	2	0.4%
27	Taiwan	2	0.4%
28	Poland	1	0.2%
29	Romania	1	0.2%
30	Belgium	1	0.2%
31	Canada	1	0.2%
32	Ireland	1	0.2%
33	Italy	1	0.2%