Year	National Currency
1998-01-01	15005959963.0
1999-01-01	16963594671.9
2000-01-01	19192567903.8
2001-01-01	21202136427.4
2002-01-01	22103020167.0
2003-01-01	23538125336.6
2004-01-01	25585245249.6
2005-01-01	29024537522.7
2006-01-01	31734545422.5
2007-01-01	35539429871.1
2008-01-01	36425052037.6
2009-01-01	33785493862.6
2010-01-01	32569683854.0