Year	Number
2004-01-01	15.32994179
2005-01-01	18.18423601
2006-01-01	25.19716126
2007-01-01	29.89569151
2008-01-01	30.95635946
2009-01-01	49.53576952
2010-01-01	46.90150133
2011-01-01	22.96792042
2012-01-01	31.00537550
2013-01-01	33.99034611
2014-01-01	56.50767142