Year Number 2007-01-01 552.1623 2008-01-01 562.1212 2009-01-01 567.9567 2010-01-01 570.2692 2011-01-01 695.7923 2012-01-01 709.7427 2013-01-01 707.9685 2014-01-01 703.5607 2015-01-01 688.9994 2016-01-01 698.7127 2017-01-01 699.8182