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 431000000 1999-01-01 889000000 2000-01-01 2184000000 2001-01-01 2484000000 2002-01-01 2155000000 2003-01-01 2576000000 2004-01-01 2727000000 2005-01-01 3776000000 2006-01-01 3448000000 2007-01-01 5017000000 2008-01-01 4124000000 2009-01-01 4088000000 2010-01-01 4455000000 2011-01-01 3874000000 2012-01-01 3694000000 2013-01-01 3222000000