Rank	Countries/Territories	Count	Percent
1	United States	566	34.6%
2	China	323	19.8%
3	Germany	99	6.1%
4	Japan	83	5.1%
5	Australia	69	4.2%
6	France	66	4%
7	Zambia	47	2.9%
8	United Kingdom	41	2.5%
9	India	35	2.1%
10	Canada	31	1.9%
11	Netherlands	30	1.8%
12	Singapore	27	1.7%
13	Ireland	25	1.5%
14	Russia	15	0.9%
15	Iran, Islamic Republic of	14	0.9%
16	Italy	13	0.8%
17	Egypt	12	0.7%
18	Iraq	10	0.6%
19	Sweden	9	0.6%
20	Taiwan	8	0.5%
21	Brazil	8	0.5%
22	Cyprus	7	0.4%
23	Saudi Arabia	6	0.4%
24	Philippines	5	0.3%
25	Israel	5	0.3%
26	Jordan	4	0.2%
27	Korea, Republic of	4	0.2%
28	Latvia	4	0.2%
29	Ethiopia	4	0.2%
30	Algeria	4	0.2%
31	Pakistan	4	0.2%
32	Turkey	4	0.2%
33	Poland	3	0.2%
34	New Zealand	3	0.2%
35	Namibia	3	0.2%
36	Libya	3	0.2%
37	Malaysia	3	0.2%
38	Mauritius	3	0.2%
39	Kenya	3	0.2%
40	Lithuania	2	0.1%
41	Colombia	2	0.1%
42	Morocco	2	0.1%
43	Romania	2	0.1%
44	Ukraine	2	0.1%
45	Spain	2	0.1%
46	Sri Lanka	2	0.1%
47	Viet Nam	2	0.1%
48	Yemen	1	0.1%
49	Switzerland	1	0.1%
50	Rwanda	1	0.1%
51	United Arab Emirates	1	0.1%
52	Portugal	1	0.1%
53	Oman	1	0.1%
54	Costa Rica	1	0.1%
55	Bulgaria	1	0.1%
56	Argentina	1	0.1%
57	Bahamas	1	0.1%
58	Belarus	1	0.1%
59	Greece	1	0.1%
60	Lebanon	1	0.1%
61	Mexico	1	0.1%
62	Mongolia	1	0.1%
63	Kuwait	1	0.1%