Year	Number
2004-01-01	81.1074
2005-01-01	86.6280
2006-01-01	88.0306
2007-01-01	94.4600
2008-01-01	99.4369
2009-01-01	101.7843
2010-01-01	103.0243
2011-01-01	104.8059
2012-01-01	101.5618
2013-01-01	100.7380
2014-01-01	96.0529
2015-01-01	95.3981
2016-01-01	95.2911
2017-01-01	93.5854