Year	Index
1980	12.705
1981	14.77
1982	17.867
1983	21.053
1984	24.354
1985	26.466
1986	26.734
1987	27.861
1988	29.624
1989	31.247
1990	43.778
1991	45.121
1992	48.742
1993	51.301
1994	37.89
1995	53.144
1996	52.619
1997	58.918
1998	64.083
1999	64.367
2000	65.703
2001	67.915
2002	68.921
2003	70.677
2004	75.676
2005	78.699
2006	82.85
2007	89.054
2008	97.176
2009	101.732
2010	100.875
2011	104.051
2012	108.164
2013	110.052
2014	110.377
2015	113.385
2016	111.573
2017	112.755
2018	116.021
2019	121.909
2020	127.031
2021	131.465
2022	135.134
2023	138.906
2024	142.795