Year National currency (Billions) 1998 0.176 1999 0.236 2000 0.327 2001 0.435 2002 0.640 2003 0.907 2004 1.247 2005 1.650 2006 2.005 2007 2.598 2008 3.553 2009 4.870 2010 6.390 2011 7.301 2012 8.942 2013 11.214 2014 12.529 2015 15.443 2016 17.889 2017 21.763 2018 21.937 2019 22.796 2020 24.485 2021 27.940 2022 32.354 2023 37.089 2024 42.468 2025 49.582 2026 56.104 2027 62.547 2028 67.160 2029 73.268