Year % of GDP 2012 48.1121966084921 2013 47.6490949146215 2014 50.513553958547 2015 52.0320364694667 2016 48.9780058468049 2017 49.8844792422858 2018 50.2444525582772 2019 51.2679656532734 2020 55.7466286882265 2021 55.501013341123 2022 55.1610394031239 2023 55.8680266849501