Rank	Countries/Territories	Count	Percent
1	United States	459	38.3%
2	China	240	20%
3	Germany	122	10.2%
4	Japan	36	3%
5	United Kingdom	32	2.7%
6	Netherlands	30	2.5%
7	Canada	29	2.4%
8	Zambia	27	2.3%
9	France	24	2%
10		22	1.8%
11	South Africa	21	1.8%
12	India	20	1.7%
13	Cyprus	15	1.3%
14	Australia	13	1.1%
15	Singapore	11	0.9%
16	Russia	10	0.8%
17	Portugal	7	0.6%
18	Romania	7	0.6%
19	Brazil	7	0.6%
20	Norway	6	0.5%
21	Italy	6	0.5%
22	Switzerland	6	0.5%
23	Ukraine	6	0.5%
24	Turkey	5	0.4%
25	Hong Kong	5	0.4%
26	Israel	4	0.3%
27	Ireland	3	0.3%
28	Denmark	3	0.3%
29	Mexico	3	0.3%
30	Thailand	3	0.3%
31	Moldova, Republic of	2	0.2%
32	Sweden	2	0.2%
33	Bangladesh	2	0.2%
34	Belgium	2	0.2%
35	Argentina	1	0.1%
36	Bulgaria	1	0.1%
37	Indonesia	1	0.1%
38	Taiwan	1	0.1%
39	Spain	1	0.1%
40	Mongolia	1	0.1%
41	Korea, Republic of	1	0.1%
42	Pakistan	1	0.1%