Year	Index
1980	24.206
1981	28.222
1982	30.049
1983	31.506
1984	32.899
1985	34.213
1986	35.908
1987	37.685
1988	40.363
1989	42.802
1990	47.128
1991	51.598
1992	55.594
1993	59.039
1994	63.823
1995	68.252
1996	71.157
1997	74.049
1998	77.468
1999	76.55
2000	77.382
2001	80.207
2002	82.661
2003	85.468
2004	88.018
2005	88.926
2006	88.802
2007	90.931
2008	93.619
2009	96.935
2010	100
2011	101.585
2012	102.645
2013	103.521
2014	104.142
2015	106.636
2016	108.745
2017	111.208
2018	111.565
2019	113.094
2020	114.961
2021	116.913
2022	119.001
2023	121.328
2024	123.991