Year	Number
2004-01-01	26.3891
2005-01-01	34.4334
2006-01-01	54.8172
2007-01-01	67.5169
2008-01-01	79.8649
2009-01-01	87.6178
2010-01-01	90.3071
2011-01-01	93.5535
2012-01-01	92.7965
2013-01-01	93.4315
2014-01-01	92.9768
2015-01-01	92.4245
2016-01-01	95.7001
2017-01-01	94.2793