Year National Currency 1988-01-01 8491683671.3 1989-01-01 9139431096.7 1990-01-01 10049498250.7 1991-01-01 10985680651.5 1992-01-01 11962499160.6 1993-01-01 12497426728.3 1994-01-01 13128522167.0 1995-01-01 13564030071.6 1996-01-01 14166110002.1 1997-01-01 14789773711.3 1998-01-01 15787220858.5 1999-01-01 16873788437.7 2000-01-01 18057521572.6 2001-01-01 18992229039.6 2002-01-01 20012125474.4 2003-01-01 20900611437.5 2004-01-01 21679927689.2 2005-01-01 23054006443.0 2006-01-01 24708540051.3 2007-01-01 26362340449.8 2008-01-01 27654199707.1 2009-01-01 27689781904.6 2010-01-01 29021469658.6