Year	Number
2004-01-01	35.0095
2005-01-01	35.1498
2006-01-01	35.3509
2007-01-01	35.1376
2008-01-01	34.9895
2009-01-01	35.6979
2010-01-01	34.4906
2011-01-01	33.9121
2012-01-01	33.3138
2013-01-01	30.8211
2014-01-01	29.5524
2015-01-01	28.9567