Year	Index
1980	31.758
1981	35.574
1982	37.482
1983	39.481
1984	41.299
1985	43.616
1986	45.251
1987	46.932
1988	50.54
1989	53.318
1990	57.502
1991	61.536
1992	63.186
1993	64.724
1994	65.884
1995	67.743
1996	69.372
1997	70.607
1998	71.585
1999	72.389
2000	73.08
2001	73.826
2002	74.951
2003	75.937
2004	77.027
2005	78.666
2006	80.802
2007	82.514
2008	85.715
2009	87.533
2010	90.492
2011	94.683
2012	97.177
2013	99.186
2014	100.093
2015	100.157
2016	101.371
2017	104.441
2018	106.815
2019	108.753
2020	110.937
2021	113.175
2022	115.439
2023	117.748
2024	120.102