Year	National Currency
1997-01-01	1400000000
1998-01-01	2200000000
1999-01-01	900000000
2000-01-01	1600000000
2001-01-01	600000000
2002-01-01	900000000
2003-01-01	1700000000
2004-01-01	600000000
2005-01-01	1200000000
2006-01-01	2500000000
2007-01-01	1500000000
2008-01-01	-300000000
2009-01-01	-1300000000
2010-01-01	-500000000
2011-01-01	700000000
2012-01-01	200000000
2013-01-01	800000000
2014-01-01	1600000000
2015-01-01	2800000000