Year	Index
1980	29.826
1981	33.519
1982	36.181
1983	38.184
1984	40.149
1985	42.283
1986	44.17
1987	46.562
1988	49.301
1989	53.132
1990	57.39
1991	61.177
1992	63.05
1993	64.743
1994	65.57
1995	67.182
1996	69.924
1997	70.424
1998	71.184
1999	71.745
2000	73.263
2001	73.862
2002	75.475
2003	77.289
2004	79.196
2005	81.218
2006	83.599
2007	85.725
2008	88.163
2009	89.591
2010	90.964
2011	92.709
2012	94.158
2013	95.915
2014	97.556
2015	97.981
2016	100
2017	102.204
2018	104.144
2019	106.054
2020	108.182
2021	110.274
2022	112.422
2023	114.655
2024	116.944