Year	Number
2004-01-01	4.849681364
2005-01-01	4.846389069
2006-01-01	4.807618768
2007-01-01	5.007613472
2008-01-01	5.677203140
2009-01-01	8.838778495
2010-01-01	9.000845979
2011-01-01	11.078153470
2012-01-01	10.761773120
2013-01-01	10.079055980
2014-01-01	9.673371127