Year	Number
2004-01-01	67.3724
2005-01-01	69.9948
2006-01-01	72.7808
2007-01-01	75.5881
2008-01-01	78.2335
2009-01-01	76.9928
2010-01-01	77.7332
2011-01-01	78.9674
2012-01-01	80.1541
2013-01-01	79.5970
2014-01-01	76.8260
2015-01-01	75.5847
2016-01-01	73.7998