排名	国家/地区	数量	占比
1	China	90	41.9%
2	United States	80	37.2%
3	South Africa	8	3.7%
4	Australia	5	2.3%
5	Germany	5	2.3%
6	Mongolia	3	1.4%
7	Slovakia	3	1.4%
8	Netherlands	2	0.9%
9	Denmark	2	0.9%
10	Switzerland	2	0.9%
11	Poland	2	0.9%
12	Romania	2	0.9%
13	Singapore	1	0.5%
14	Turkey	1	0.5%
15	Georgia	1	0.5%
16	Norway	1	0.5%
17	India	1	0.5%
18	Israel	1	0.5%
19	Japan	1	0.5%
20	Lithuania	1	0.5%
21	Brazil	1	0.5%
22	Canada	1	0.5%
23	Chile	1	0.5%