Year Number 2009-01-01 329.5305 2010-01-01 454.2711 2011-01-01 574.3273 2012-01-01 819.6831 2013-01-01 1235.8698 2014-01-01 1899.9970 2015-01-01 2181.7465 2016-01-01 2021.3783