Year % of GDP 2008 11.447807283979897 2009 15.277268067806677 2010 18.932787553429804 2011 21.434862235903125 2012 24.340718353798426 2013 26.546920828689586 2014 29.85743146366403 2015 32.47867978823574 2016 36.436521468060654 2017 39.85610908137491 2018 45.30709824588096 2019 49.465769867854696 2020 59.50326280505086 2021 57.077998908592434 2022 58.51170631473235 2023 59.24438519750783