Year National currency (Units) 1980 8549455.923 1981 8553604.535 1982 8449309.031 1983 8400894.412 1984 8501975.554 1985 8825879.694 1986 9150069.434 1987 9443525.538 1988 9625737.626 1989 9752064.826 1990 9966685.363 1991 9995410.470 1992 10226027.964 1993 10607514.328 1994 10955523.544 1995 11332706.414 1996 11380416.532 1997 11618326.761 1998 11505681.351 1999 10883164.874 2000 11035806.288 2001 11078566.250 2002 11214471.972 2003 11509074.877 2004 11974348.576 2005 12354950.742 2006 13029033.871 2007 13747675.441 2008 14042582.679 2009 14048045.077 2010 14520409.201 2011 15366431.162 2012 15808670.324 2013 16461779.570 2014 17040701.818 2015 17374719.787 2016 17541895.476 2017 17559469.582 2018 17696553.067 2019 17840123.583 2020 16237038.742 2021 17752221.579 2022 18839525.472 2023 18756159.137 2024 18777331.234 2025 19051275.878 2026 19434438.127 2027 19825306.596 2028 20224036.272 2029 20630785.262