Year	Number
2004-01-01	1.1115
2005-01-01	1.1050
2006-01-01	1.1373
2007-01-01	1.2246
2008-01-01	1.3312
2009-01-01	1.4410
2010-01-01	1.4895
2011-01-01	1.5444
2012-01-01	1.6155
2013-01-01	1.7738
2014-01-01	1.7415
2015-01-01	1.7835
2016-01-01	1.8223