Year National currency (Billions) 1995 -0.434 1996 -1.819 1997 -1.090 1998 -0.881 1999 -1.254 2000 -3.020 2001 -1.411 2002 -1.962 2003 -0.606 2004 -0.403 2005 -0.882 2006 -1.516 2007 -0.695 2008 -1.101 2009 -4.511 2010 -4.373 2011 -2.119 2012 -2.036 2013 -0.880 2014 -1.081 2015 -0.943 2016 -0.942 2017 0.198 2018 0.129 2019 -0.149 2020 -4.064 2021 -4.551 2022 -1.811 2023 -6.868 2024 -6.525 2025 -6.820 2026 -6.097 2027 -6.671 2028 -7.031 2029 -7.129