Year % (cumulative) 1970 3.79999995231628 1982 7.14266014099121 2004 13.156530380249 2007 15.0515403747559 2008 20.924259185791 2010 18.0804500579834 2011 15.1661396026611 2012 12.4730710983276 2013 17.7070007324219 2014 13.3998031616211 2015 19.8092098236084 2016 13.9364814758301 2017 22.0356903076172 2018 15.5733489990234 2019 15.9265537261963 2020 19.1351909637451 2021 19.6066036224365 2022 20.2825660705566