排名	国家/地区	数量	占比
1	China	161	48.5%
2	United States	107	32.2%
3	South Africa	16	4.8%
4	Germany	6	1.8%
5	Japan	6	1.8%
6	Australia	5	1.5%
7	Romania	4	1.2%
8	Slovakia	4	1.2%
9	Mongolia	3	0.9%
10	Netherlands	2	0.6%
11	Denmark	2	0.6%
12	France	2	0.6%
13	Poland	2	0.6%
14	Switzerland	2	0.6%
15	Turkey	1	0.3%
16	Georgia	1	0.3%
17	Brazil	1	0.3%
18	Canada	1	0.3%
19	Chile	1	0.3%
20	Norway	1	0.3%
21	Singapore	1	0.3%
22	Lithuania	1	0.3%
23	India	1	0.3%
24	Israel	1	0.3%