Year National currency, Sum Over Component Sub-periods 1980-01-01 4000000 1981-01-01 4000000 1982-01-01 4000000 1983-01-01 4000000 1984-01-01 4000000 1985-01-01 4000000 1986-01-01 8000000 1987-01-01 9000000 1988-01-01 11000000 1989-01-01 12000000 1990-01-01 9000000 1991-01-01 13000000 1992-01-01 10000000 1993-01-01 14000000 1994-01-01 22000000 1995-01-01 23000000 1996-01-01 24000000 1997-01-01 36000000 1998-01-01 433000000 1999-01-01 895000000 2000-01-01 2185000000 2001-01-01 2477000000 2002-01-01 2157000000 2003-01-01 2594000000 2004-01-01 2738000000 2005-01-01 3785000000 2006-01-01 3456000000 2007-01-01 4945000000 2008-01-01 4119000000 2009-01-01 4116000000 2010-01-01 4477000000 2011-01-01 3869000000 2012-01-01 3683000000 2013-01-01 3221000000