Year % of GDP 1995 22.340899388920814 1996 19.20656007804346 1997 10.783270591804179 1998 9.966016626724397 2010 23.052609630568167 2011 20.077519236972154 2013 17.665484520514 2014 17.392987226873917 2015 19.264651531365597 2016 19.049112161902634 2017 21.16186636874274 2018 19.511963703663383 2019 20.2914219995202 2020 20.17261371939596 2021 17.260403144683274 2022 17.39318431073932