Year	National Currency
2004-01-01	12293426600
2005-01-01	15228655100
2006-01-01	18987201000
2007-01-01	26016784700
2008-01-01	30526112500
2009-01-01	31214344700
2010-01-01	31989202200
2011-01-01	31219000000
2012-01-01	29522000000
2013-01-01	24562000000
2014-01-01	21107000000
2015-01-01	19646000000
2016-01-01	18814000000
2017-01-01	19095000000