Year	National currency (Units)
1980	6811.48
1981	6948.81
1982	7025.16
1983	7195.55
1984	7520.22
1985	7677.73
1986	8047.75
1987	8686.22
1988	8708.10
1989	8575.48
1990	9207.67
1991	9137.24
1992	9525.84
1993	10127.21
1994	9424.30
1995	9946.55
1996	10482.99
1997	11105.37
1998	11287.14
1999	10749.70
2000	11302.06
2001	10486.66
2002	11026.73
2003	11509.01
2004	12466.28
2005	13421.67
2006	14196.66
2007	14729.99
2008	14661.12
2009	13770.37
2010	14703.65
2011	16118.88
2012	16689.28
2013	17860.57
2014	18534.85
2015	19401.90
2016	19750.24
2017	20958.36
2018	21183.55
2019	20392.74
2020	20657.72
2021	21017.47
2022	21396.46
2023	21890.06
2024	22404.34