Year	Number
2004-01-01	45.3838
2005-01-01	77.7648
2006-01-01	50.5081
2007-01-01	54.1693
2008-01-01	60.5894
2009-01-01	62.7119
2010-01-01	70.1868
2011-01-01	78.4483
2012-01-01	95.9532
2013-01-01	100.7804
2014-01-01	114.8127
2015-01-01	125.1016