Year Number 2008-01-01 1728.4289 2009-01-01 1757.3970 2010-01-01 1850.3211 2011-01-01 1877.8630 2012-01-01 2232.6302 2013-01-01 2321.2177 2014-01-01 1972.0170 2015-01-01 1987.3182 2016-01-01 1955.1306