Year	National currency, Monthly Level
1970-01-01	561
1971-01-01	560
1972-01-01	588
1973-01-01	587
1974-01-01	584
1975-01-01	580
1976-01-01	575
1977-01-01	576
1978-01-01	615
1979-01-01	668
1980-01-01	762
1981-01-01	772
1982-01-01	798
1983-01-01	826
1984-01-01	974
1985-01-01	1148
1986-01-01	1329
1987-01-01	1459
1988-01-01	1747
1989-01-01	1935
1990-01-01	2140
1991-01-01	2340
1992-01-01	2711
1993-01-01	3371
1994-01-01	4499
1995-01-01	5348
1996-01-01	5980
1997-01-01	6444
1998-01-01	7446
1999-01-01	8319
2000-01-01	9333
2001-01-01	10384
2002-01-01	12373
2003-01-01	13969
2004-01-01	15920
2005-01-01	18200
2006-01-01	20856
2007-01-01	24721
2008-01-01	28898
2009-01-01	32244
2010-01-01	36539
2011-01-01	41799
2012-01-01	46769
2013-01-01	51474
2014-01-01	56360