Year	Number
2007-01-01	10.8696
2008-01-01	10.8696
2009-01-01	10.8696
2010-01-01	13.0435
2011-01-01	13.0435
2012-01-01	15.2174
2013-01-01	15.2174
2014-01-01	17.3913
2015-01-01	17.3913
2016-01-01	17.3913