select count(login) from users where login > 0 and from_unixtime(login) > '2008-08-01 00:00:00' and status= 1;
+--------------+
| count(login) |
+--------------+
| 34626 |
+--------------+

That means that 10% of all drupal.org user accounts are actively used. Not that bad at all.

133257 is the result for the same query if you change the date to 1st of January. That is over50% of the accounts that exist on drupal.org and have been used at least once. Quite impressive.