From
mw.org:
mysql> select count(*), up_value from user_properties where
up_property='skin' group by up_value;
+----------+-------------+
| count(*) | up_value |
+----------+-------------+
| 150489 | |
| 15 | amethyst |
| 229 | chick |
| 610 | cologneblue |
| 894 | modern |
| 15072 | monobook |
| 126 | myskin |
| 140 | nostalgia |
| 114 | simple |
| 257 | standard |
| 3661 | vector |
+----------+-------------+
11 rows in set (11.64 sec)
user_touched is unavailable on Toolserver, so can't make a more
detailed query.