<p>Re recent change (whuber's comment to Srkikant's answer): There do appear to be a few less highly active contributors so far this month. I just looked at the number of users with month reputation over 200, adjusting for the fact that it's currently only 18 oct by looking at number over 200*18/31 = 116 for october:</p>

<p>34 in July,
28 in August,
31 in September,
25 in October (part).</p>

<p>Surely this could have something to do with the start of the academic year in the Northern Hemisphere, though?</p>
