Year	Number
2004-01-01	25.26189764
2005-01-01	24.49083503
2006-01-01	20.45050385
2007-01-01	27.08744247
2008-01-01	26.27136983
2009-01-01	27.56423023
2010-01-01	34.57964602
2011-01-01	38.32581042
2012-01-01	80.92243187
2013-01-01	72.97734628
2014-01-01	59.28931170