2009-07-01 to 2009-10-01 (32 threads) 2009-04-01 to 2009-07-01 (46 threads) 2009-01-01 to 2009-04-01 (43 threads) 2008-10-01 to 2009-01-01 (29 threads) 2008-07-01 to 2008-10-01 (31 threads) 2008-04-01 to 2008-07-01 (39 threads) 2008-01-01 to 2008-04-01 (56 threads) 2007-10-01 to 2008-01-01 (28 threads) 2007-07-01 to 2007-10-01 (39 threads) 2007-04-01 to 2007-07-01 (38 threads) 2007-01-01 to 2007-04-01 (56 threads) 2006-10-01 to 2007-01-01 (41 threads) 2006-07-01 to 2006-10-01 (52 threads) 2006-04-01 to 2006-07-01 (68 threads) 2006-01-01 to 2006-04-01 (65 threads) 2005-10-01 to 2006-01-01 (59 threads) 2005-07-01 to 2005-10-01 (67 threads) 2005-04-01 to 2005-07-01 (40 threads) 2005-01-01 to 2005-04-01 (29 threads) 2004-10-01 to 2005-01-01 (35 threads) 2004-07-01 to 2004-10-01 (43 threads) 2004-04-01 to 2004-07-01 (53 threads)