Year Percent 2009-01-01 1.195096711655450 2010-01-01 3.983479418558330 2011-01-01 4.971485716923810 2012-01-01 6.581474476836840 2013-01-01 4.821019562973910 2014-01-01 1.854604213409170 2015-01-01 -3.749145247996350 2016-01-01 -0.783359624361543 2017-01-01 4.321352183031980