Year % 2000 18.242 2007 21.028 2010 24.345 2013 27.089 2014 29.374 2015 29.832 2016 29.533 2017 30.76 2018 30.87 2019 30.959 2020 33.212 2021 32.044 2022 33.126 2023 34.694