December not so good for spamming

December has not been the most prolific month for spammers.  After seeing a huge increase in September and October, November started to go flat.  There was a an upswing in mid-December but this latest two weeks has dropped down over Christmas.

Week % increase in spam

Sep 11 - Sep 17 -16.06%
Sep 18 - Sep 24 21.71%
Sep 25 - Oct 1 -13.14%
Oct 2 - Oct 8 14.63%
Oct 9 - Oct 15 14.97%
Oct 16 - Oct 22 8.89%
Oct 23 - Oct 29 1.78%
Oct 30 - Nov 5 12.51%
Nov 6 - Nov 12 -9.22%
Nov 13 - Nov 19         -0.77%
Nov 20 - Nov 26 1.87%
Nov 27 - Dec 3 5.86%
Dec 4 - Dec 10 3.58%
Dec 11 - Dec 17 18.03%
Dec 18 - Dec 24         -2.82%
Dec 25 - Jan 1 -18.08%

I guess even spammers take a holiday.  Well, that and the earthquake that disrupted their spamming patterns.  It wasn't a big a drop as I thought but it was definitely noticeable.