Year National currency (Billions) 1985 13.037 1986 12.683 1987 12.938 1988 13.080 1989 12.940 1990 13.081 1991 13.492 1992 14.134 1993 14.177 1994 14.623 1995 15.278 1996 15.718 1997 15.487 1998 15.400 1999 15.870 2000 16.322 2001 16.770 2002 17.420 2003 17.926 2004 18.016 2005 18.086 2006 18.881 2007 18.910 2008 18.544 2009 18.216 2010 18.690 2011 19.390 2012 19.567 2013 19.151 2014 18.671 2015 18.595 2016 18.137 2017 18.378 2018 18.387 2019 19.099 2020 19.315 2021 19.008 2022 18.698 2023 18.961 2024 19.414 2025 19.903 2026 20.483 2027 21.109 2028 21.755 2029 22.425