Year	National currency (Units)
1992	6651.507
1993	7572.076
1994	9242.698
1995	9517.627
1996	10424.979
1997	11253.674
1998	11417.652
1999	11280.464
2000	9649.557
2001	10127.665
2002	9986.339
2003	9272.654
2004	8995.701
2005	8878.044
2006	8517.811
2007	8411.615
2008	6630.725
2009	7302.407
2010	7967.224
2011	9878.469
2012	9953.292
2013	8828.345
2014	11454.606
2015	9005.474
2016	9573.704
2017	8524.055
2018	9523.313
2019	9764.198