Year National currency (Billions) 2011 31.497 2012 15.648 2013 19.915 2014 20.225 2015 20.178 2016 17.495 2017 16.481 2018 16.127 2019 16.265 2020 15.209 2021 16.020 2022 15.189 2023 15.178 2024 16.029 2025 17.118 2026 18.015 2027 18.976 2028 20.045 2029 21.200