Year Number 2005-01-01 294.1839 2006-01-01 314.0269 2007-01-01 390.4520 2008-01-01 444.7615 2009-01-01 445.5427 2010-01-01 411.2572 2011-01-01 397.3803 2012-01-01 411.9066 2013-01-01 423.1317 2014-01-01 431.7606 2015-01-01 423.8615 2016-01-01 425.0236 2017-01-01 424.2735