Year	National Currency
2006-01-01	3505000000
2007-01-01	4005000000
2008-01-01	4589000000
2009-01-01	4355000000
2010-01-01	4941000000
2011-01-01	7279000000
2012-01-01	10256000000
2013-01-01	11797000000
2014-01-01	13585000000
2015-01-01	15084000000