Year Number 2008-01-01 960.3247 2009-01-01 953.0226 2010-01-01 995.7025 2011-01-01 1115.7971 2012-01-01 1145.0606 2013-01-01 1115.6871 2014-01-01 1082.5254 2015-01-01 1110.7145 2016-01-01 1131.5409