Year	Number
2004-01-01	1.1209
2005-01-01	1.1146
2006-01-01	1.1363
2007-01-01	1.2666
2008-01-01	1.3334
2009-01-01	1.4113
2010-01-01	1.4649
2011-01-01	1.5304
2012-01-01	1.6125
2013-01-01	1.6794
2014-01-01	1.9011
2015-01-01	2.0647
2016-01-01	2.2033
2017-01-01	2.3948