Year	Index
1980	34.371
1981	38.168
1982	40.496
1983	42.116
1984	43.787
1985	45.812
1986	48.292
1987	51.187
1988	53.26
1989	56.139
1990	58.737
1991	63.028
1992	66.543
1993	68.371
1994	69.306
1995	70.708
1996	71.601
1997	72.003
1998	72.872
1999	73.688
2000	74.964
2001	76.734
2002	77.884
2003	80.731
2004	81.668
2005	83.153
2006	84.781
2007	86.822
2008	90.671
2009	92.181
2010	93.676
2011	96.546
2012	98.393
2013	98.83
2014	100
2015	101.879
2016	101.525
2017	102.948
2018	105.264
2019	108.016
2020	110.587
2021	113.112
2022	115.625
2023	118.164
2024	120.713