Year	Index
1980	24.348
1981	27.484
1982	30.373
1983	32.487
1984	34.505
1985	36.298
1986	36.098
1987	38.705
1988	40.59
1989	42.867
1990	44.501
1991	45.486
1992	45.195
1993	46.231
1994	46.159
1995	47.572
1996	49.599
1997	50.981
1998	50.629
1999	54.003
2000	62.338
2001	63.361
2002	62.287
2003	64.071
2004	67.809
2005	73.749
2006	80.221
2007	82.668
2008	91.293
2009	86.542
2010	91.693
2011	97.884
2012	101.17
2013	103.744
2014	104.086
2015	101.149
2016	100
2017	103.878
2018	109.659
2019	111.336
2020	113.269
2021	115.447
2022	117.785
2023	120.198
2024	122.649