Year	Number
2004-01-01	37.8728
2005-01-01	41.7424
2006-01-01	44.4754
2007-01-01	49.3486
2008-01-01	38.5903
2009-01-01	33.2716
2010-01-01	47.7619
2011-01-01	76.0760
2012-01-01	74.5268
2013-01-01	83.3645
2014-01-01	87.6617
2015-01-01	101.8921
2016-01-01	95.6688
2017-01-01	96.9257