Year Number 2009-01-01 1148.2986 2010-01-01 1108.3391 2011-01-01 1180.0372 2012-01-01 1256.3354 2013-01-01 1317.3550 2014-01-01 1400.1317 2015-01-01 1515.0748 2016-01-01 1539.4305 2017-01-01 1678.4909