Year % (cumulative) 1972 2.59999990463257 2005 3.77610993385315 2006 14.5875101089478 2007 12.4277315139771 2008 14.4256896972656 2009 14.6208000183105 2010 14.9084196090698 2011 14.2362298965454 2012 18.6863708496094 2013 19.3326797485352 2014 20.9723205566406 2015 18.4534645080566 2016 51.2772331237793 2017 21.4118595123291 2018 7.33107995986938 2019 10.1383695602417 2021 19.7487697601318