Year	National Currency
1988-01-01	17815501775.9
1989-01-01	17515330875.2
1990-01-01	16849237713.7
1991-01-01	16140893082.3
1992-01-01	16684735882.4
1993-01-01	17735032860.7
1994-01-01	18842988394.4
1995-01-01	19434735805.6
1996-01-01	19837270531.4
1997-01-01	19746100835.5
1998-01-01	18979368196.6
1999-01-01	19637613853.4
2000-01-01	20533340230.3
2001-01-01	20561100067.4
2002-01-01	21981630584.9
2003-01-01	22685964659.2
2004-01-01	23240653173.8
2005-01-01	22955788813.6
2006-01-01	21945163885.7
2007-01-01	22341115445.9
2008-01-01	22119460983.5
2009-01-01	20334968509.7
2010-01-01	20520266484.6