Analysis at took    18.76 s 	(   18.74 s of cpu), 501794 entries, done on Thu Apr 21 19:38:02 2011
 Analysis at took    21.09 s 	(   19.03 s of cpu), 501794 entries, done on Fri Apr 22 08:48:41 2011
 Analysis at took    32.27 s 	(   29.62 s of cpu), 501794 entries, done on Fri May 27 11:00:46 2011