Year	Number
2004-01-01	34.2004
2005-01-01	33.7694
2006-01-01	36.1293
2007-01-01	37.3285
2008-01-01	42.3026
2009-01-01	44.8129
2010-01-01	44.7211
2011-01-01	45.6934
2012-01-01	50.8958
2013-01-01	64.0890
2014-01-01	65.8065
2015-01-01	65.6588
2016-01-01	71.8011