Year	Number
2004-01-01	12.2900
2005-01-01	12.5047
2006-01-01	12.6353
2007-01-01	20.7540
2008-01-01	23.4882
2009-01-01	26.1851
2010-01-01	27.6316
2011-01-01	29.1620
2012-01-01	30.5244
2013-01-01	31.6909
2014-01-01	32.4188
2015-01-01	33.2587
2016-01-01	33.2027
2017-01-01	33.3333