Year	Number
2007-01-01	91.12237217
2008-01-01	91.26546952
2009-01-01	91.67871792
2010-01-01	91.25103348
2011-01-01	91.38384892
2012-01-01	87.79682829
2013-01-01	85.38855253
2014-01-01	85.48764516