Year	Number
2004-01-01	3.9026
2005-01-01	6.2456
2006-01-01	8.4856
2007-01-01	11.7355
2008-01-01	14.0720
2009-01-01	16.8097
2010-01-01	21.3989
2011-01-01	25.9095
2012-01-01	30.3989
2013-01-01	57.9979
2014-01-01	58.5012
2015-01-01	65.3102
2016-01-01	69.0145
2017-01-01	71.3778