Year % of GDP 2012 92.9986076313701 2013 93.11820192082894 2014 93.70987301316916 2015 93.57005909230782 2016 93.6470203089933 2017 93.66242957256273 2018 93.41501712039985 2019 93.9339629637708 2020 91.77203657443779 2021 91.81344709860916