Year	Number
2004-01-01	27.8167
2009-01-01	30.2219
2010-01-01	33.8810
2011-01-01	39.5198
2012-01-01	42.6738
2013-01-01	44.9285
2014-01-01	51.9318
2015-01-01	54.6967
2016-01-01	81.9801
2017-01-01	85.2240