Year % of GDP 2010 25.47866989078466 2011 25.70419496020347 2012 25.65805675325406 2013 26.45646813279771 2014 26.59036881012409 2015 28.42934704711289 2016 28.44641557405063 2017 27.87871990315918 2018 27.640278542338184 2019 27.492606947054277 2020 30.786610040291283 2021 27.33104658852712 2022 28.284401124744335