Year National currency (Billions) 1998 20.269 1999 20.044 2000 19.196 2001 19.109 2002 17.637 2003 14.775 2004 13.849 2005 12.822 2006 12.366 2007 11.946 2008 9.996 2009 10.735 2010 12.848 2011 14.672 2012 17.116 2013 17.454 2014 17.872 2015 18.193 2016 18.330 2017 19.279 2018 20.240 2019 18.964 2020 17.488 2021 18.961 2022 20.191 2023 21.264 2024 21.943 2025 22.650 2026 23.361 2027 24.076 2028 24.804 2029 25.549