Year National currency (Billions) 2002 1.030 2003 0.608 2004 0.757 2005 0.700 2006 0.796 2007 0.854 2008 1.061 2009 1.308 2010 1.407 2011 1.586 2012 1.809 2013 1.972 2014 2.191 2015 2.513 2016 2.625 2017 2.846 2018 3.352 2019 3.901 2020 4.493 2021 4.243 2022 4.180 2023 4.211 2024 4.628 2025 4.846 2026 5.173 2027 5.527 2028 5.966 2029 6.396