Year National Currency 1961-01-01 6761534499.319651 1962-01-01 7431803273.216781 1963-01-01 7910507061.298970 1964-01-01 8697634650.072310 1965-01-01 9470294004.622879 1966-01-01 10078098959.615900 1967-01-01 10396678347.790400 1968-01-01 11140262116.258600 1969-01-01 11860474121.751700 1970-01-01 11721078249.720800 1971-01-01 12376461436.484900 1972-01-01 13465335179.385000 1973-01-01 15002445947.917400 1974-01-01 15221834461.083800 1975-01-01 14099016014.814901 1976-01-01 15017609770.324000 1977-01-01 15546117672.365301 1978-01-01 16200387918.035400 1979-01-01 16989045800.813002 1980-01-01 16456225252.032200 1981-01-01 16447304489.360199 1982-01-01 15188433098.256200 1983-01-01 16015958228.098600 1984-01-01 18013344865.501000 1985-01-01 18928060875.817700 1986-01-01 18785451035.153202 1987-01-01 19571745428.749000 1988-01-01 20870877421.129097 1989-01-01 20806242178.719100 1990-01-01 20233498745.506000 1991-01-01 19512930996.162000 1992-01-01 19760315413.641300 1993-01-01 20714321890.263500 1994-01-01 22007996873.434498 1995-01-01 23018089150.317200 1996-01-01 23291774229.237400 1997-01-01 24606130395.338500 1998-01-01 25465744962.383800 1999-01-01 26962342432.512200 2000-01-01 29289904241.038500 2001-01-01 28110505730.933800 2002-01-01 28553938029.207798 2003-01-01 28580757228.204800 2004-01-01 29051116433.102200 2005-01-01 29618089378.964400 2006-01-01 29446080299.454200 2007-01-01 29206000000.000000 2008-01-01 28238416666.666702 2009-01-01 25008416666.666702 2010-01-01 26210750000.000000 2011-01-01 27484916666.666702 2012-01-01 27487333333.333298 2013-01-01 27895083333.333298 2014-01-01 29275500000.000000 2015-01-01 29108083333.333298 2016-01-01 29250000000.000000 2017-01-01 30548333333.333298