Year	National Currency
1970-01-01	22870837439.6
1971-01-01	26347946861.4
1972-01-01	30564967546.3
1973-01-01	33433098074.4
1974-01-01	33708849317.6
1975-01-01	33167094149.7
1976-01-01	35219442293.2
1977-01-01	36552558691.6
1978-01-01	38790441008.1
1979-01-01	42470341520.1
1980-01-01	46825627653.9
1981-01-01	47864211208.3
1982-01-01	48626304714.8
1983-01-01	49054269622.2
1984-01-01	50542382914.0
1985-01-01	47410831587.2
1986-01-01	49334351873.3
1987-01-01	49664168205.9
1988-01-01	52387610767.0
1989-01-01	55501979086.0
1990-01-01	61356175600.0
1991-01-01	65946992444.0
1992-01-01	75113722528.0
1993-01-01	81012469555.0
1994-01-01	88017051310.0
1995-01-01	90717144736.0
1996-01-01	89837307602.0
1997-01-01	86496889485.0
1998-01-01	83757051804.0
1999-01-01	83355578620.0
2000-01-01	82455060640.0
2001-01-01	78762710789.0
2002-01-01	75587343648.0
2003-01-01	73502025362.0
2004-01-01	71407628042.0
2005-01-01	69264446166.0
2006-01-01	69544896789.0
2007-01-01	71803874813.0
2008-01-01	71890651852.0
2009-01-01	72797194244.0
2010-01-01	73748427673.0