Year	Number
2004-01-01	44.0050
2005-01-01	42.9614
2006-01-01	41.7940
2007-01-01	40.5057
2008-01-01	39.7096
2009-01-01	39.2806
2010-01-01	38.9941
2011-01-01	48.7874
2012-01-01	48.5849
2013-01-01	47.5893
2014-01-01	47.1864
2015-01-01	47.0451
2016-01-01	45.8102
2017-01-01	45.3285