Year	Number
2004-01-01	48.8054
2005-01-01	49.5660
2006-01-01	50.8028
2007-01-01	52.0473
2008-01-01	53.3917
2009-01-01	56.0191
2010-01-01	59.0612
2011-01-01	61.8883
2012-01-01	64.7538
2013-01-01	67.4503
2014-01-01	70.4233
2015-01-01	73.1659
2016-01-01	75.1248