Year	Number
2006-01-01	26.9561
2007-01-01	31.8080
2008-01-01	31.9189
2009-01-01	29.2970
2010-01-01	27.4518
2011-01-01	26.7557
2012-01-01	25.8751
2013-01-01	24.6248
2014-01-01	23.9856
2015-01-01	22.2316
2016-01-01	21.7460