Year	Number
2004-01-01	26.2919
2005-01-01	28.6488
2006-01-01	32.4432
2007-01-01	37.6796
2008-01-01	45.3085
2009-01-01	51.3060
2010-01-01	53.5882
2011-01-01	56.7939
2012-01-01	59.3952
2013-01-01	61.6440
2014-01-01	67.0531
2015-01-01	72.3178
2016-01-01	76.4754