Rank	Countries/Territories	Count	Percent
1	United States	248	36.7%
2	China	224	33.1%
3	Germany	38	5.6%
4	Japan	26	3.8%
5	India	18	2.7%
6	Canada	14	2.1%
7	Netherlands	12	1.8%
8	Singapore	11	1.6%
9	United Kingdom	10	1.5%
10	Tanzania, United Republic of	10	1.5%
11	France	7	1%
12	Ireland	6	0.9%
13	Pakistan	6	0.9%
14	Iraq	4	0.6%
15	Korea, Republic of	4	0.6%
16	Finland	4	0.6%
17	Cyprus	4	0.6%
18	Egypt	3	0.4%
19	Hong Kong	3	0.4%
20	Morocco	3	0.4%
21	Romania	2	0.3%
22	Zambia	2	0.3%
23	Spain	2	0.3%
24	Switzerland	2	0.3%
25	Taiwan	2	0.3%
26	Mongolia	2	0.3%
27	Iran, Islamic Republic of	1	0.1%
28	Argentina	1	0.1%
29	Australia	1	0.1%
30	Austria	1	0.1%
31	Brazil	1	0.1%
32	Peru	1	0.1%
33	Philippines	1	0.1%
34	Tunisia	1	0.1%
35	Turkey	1	0.1%