Year	Number
2004-01-01	29.7138
2005-01-01	25.0338
2006-01-01	26.5451
2007-01-01	30.4668
2008-01-01	43.5224
2009-01-01	51.7602
2010-01-01	56.1828
2011-01-01	58.0485
2012-01-01	57.8103
2013-01-01	58.7320
2014-01-01	66.1774
2015-01-01	69.3157
2016-01-01	69.2898