2009-07-01 to 2009-10-01 (293 threads) 2009-04-01 to 2009-07-01 (178 threads) 2009-01-01 to 2009-04-01 (192 threads) 2008-10-01 to 2009-01-01 (140 threads) 2008-07-01 to 2008-10-01 (132 threads) 2008-04-01 to 2008-07-01 (200 threads) 2008-01-01 to 2008-04-01 (191 threads) 2007-10-01 to 2008-01-01 (162 threads) 2007-07-01 to 2007-10-01 (182 threads) 2007-04-01 to 2007-07-01 (216 threads) 2007-01-01 to 2007-04-01 (38 threads) 2006-10-01 to 2007-01-01 (51 threads) 2006-07-01 to 2006-10-01 (51 threads)