Year % (cumulative) 1978 2.26206994056702 2012 12.1764698028564 2014 11.974160194397 2015 12.0062799453735 2017 19.5803070068359 2018 13.4044103622437 2019 20.8210182189941 2020 16.3787899017334 2021 23.2461528778076 2022 17.950159072876