Year	Number
2004-01-01	25.4153
2005-01-01	26.0797
2006-01-01	28.2392
2007-01-01	30.0664
2008-01-01	35.0498
2009-01-01	38.0399
2010-01-01	38.2060
2011-01-01	40.5316
2012-01-01	41.3621
2013-01-01	42.1927
2014-01-01	45.6811
2015-01-01	48.1728
2016-01-01	53.8206