Year National Currency 1975-01-01 12604313356.0 1976-01-01 12540758750.6 1977-01-01 12061023987.1 1978-01-01 12365471048.5 1979-01-01 13351592506.7 1980-01-01 13927684252.5 1981-01-01 14075294948.9 1982-01-01 14533503152.4 1983-01-01 14888178853.6 1984-01-01 15437618667.9 1985-01-01 16047537865.1 1986-01-01 16481144285.8 1987-01-01 17634352851.7 1988-01-01 18598947749.9 1989-01-01 19871064932.3 1990-01-01 20104781868.3 1991-01-01 18386757373.8 1992-01-01 16849145952.5 1993-01-01 16689234364.8 1994-01-01 17500068120.8 1995-01-01 18453387202.0 1996-01-01 19157613232.7 1997-01-01 20294420610.2 1998-01-01 21799229654.3 1999-01-01 22736147547.0 2000-01-01 23816575838.8 2001-01-01 25179924632.1 2002-01-01 25624806870.1 2003-01-01 25870824697.4 2004-01-01 27642153054.6 2005-01-01 28290000000.0 2006-01-01 28479638741.9 2007-01-01 30720451119.7 2008-01-01 30749153199.5 2009-01-01 26267528444.1 2010-01-01 27697507065.7