Year	Number
2004-01-01	165.8615
2005-01-01	260.9524
2006-01-01	273.6948
2007-01-01	330.8675
2008-01-01	435.8920
2009-01-01	440.0379
2010-01-01	450.5689
2011-01-01	465.8800
2012-01-01	502.3117
2013-01-01	549.3023