Year % of tax revenue 2013 9.705298368068902 2014 9.559476006663427 2015 12.719743290232376 2016 11.484096049045887 2017 10.313935174004524 2018 10.151057793355859 2019 9.80400376872622 2020 7.612677635506955 2021 8.84324334450543 2022 8.334854568367032