Year	Number
2004-01-01	1.3002
2005-01-01	1.6896
2006-01-01	18.5672
2007-01-01	41.0202
2008-01-01	58.9354
2009-01-01	69.9579
2010-01-01	72.7066
2011-01-01	75.7592
2012-01-01	80.8087
2013-01-01	84.2983
2014-01-01	73.3077