Year Number 2008-01-01 640.0435 2009-01-01 648.0392 2010-01-01 652.7622 2011-01-01 660.9041 2012-01-01 677.1567 2013-01-01 681.6595 2014-01-01 689.4855 2015-01-01 709.1322 2016-01-01 724.1152