Year Number 2008-01-01 17.2657 2009-01-01 135.8000 2010-01-01 730.2638 2011-01-01 5182.3388 2012-01-01 20361.8928 2013-01-01 36293.3539 2014-01-01 43176.9426 2015-01-01 46997.8858