Year National currency per current international dollar 2002 9.491 2003 10.551 2004 11.421 2005 12.267 2006 12.816 2007 13.613 2008 15.563 2009 15.029 2010 16.059 2011 17.356 2012 18.469 2013 18.558 2014 18.786 2015 19.083 2016 19.861 2017 19.835 2018 19.52 2019 19.55 2020 19.822 2021 20.293 2022 20.876 2023 21.476 2024 22.087