Year	Number
2004-01-01	3.109658814
2005-01-01	3.224090408
2006-01-01	3.694391669
2007-01-01	3.398260304
2008-01-01	3.797373562
2009-01-01	3.685004322
2012-01-01	2.917068709
2013-01-01	2.682737891
2014-01-01	2.464550757