Year % (cumulative) 1992 43.4443511962891 2000 43.7799987792969 2001 41.4599990844727 2002 41.5200004577637 2004 40.0400009155273 2005 45.1699981689453 2006 48.2299995422363 2007 48.7200012207031 2008 49.6599998474121 2009 51.7099990844727 2011 54.2400016784668 2012 56.0400009155273 2013 58.8800010681152 2014 55.2299995422363 2015 56.25 2016 56.7799987792969 2017 58.1199989318848 2018 58.75 2019 62.8699989318848 2020 62.7400016784668 2021 64.0800018310547 2022 69.5967788696289