Year	Number
2004-01-01	16.6765
2005-01-01	19.2831
2006-01-01	19.7366
2007-01-01	22.4381
2008-01-01	33.5963
2009-01-01	35.6893
2010-01-01	39.1671
2011-01-01	50.0027
2012-01-01	50.4992
2013-01-01	64.9160
2014-01-01	67.7666
2015-01-01	85.4450
2016-01-01	90.7804
2017-01-01	55.0431