Year	Number
2004-01-01	26.6164
2005-01-01	26.5946
2006-01-01	27.6167
2007-01-01	29.7090
2008-01-01	32.7453
2009-01-01	32.9374
2010-01-01	32.1854
2011-01-01	32.5778
2012-01-01	33.9744
2013-01-01	32.9773
2014-01-01	32.9590
2015-01-01	31.1358
2016-01-01	31.0331