Year	Index
1985	74.819
1986	46.444
1987	51.433
1988	46.94
1989	49.922
1990	54.119
1991	52.574
1992	53.506
1993	51.913
1994	47.362
1995	48.723
1996	50.909
1997	55.274
1998	48.828
1999	54.498
2000	70.318
2001	66.385
2002	66.634
2003	70.702
2004	81.934
2005	97.31
2006	107.096
2007	108.151
2008	122.308
2009	95.008
2010	100
2011	120.181
2012	121.647
2013	118.213
2014	116.03
2015	95.607
2016	86.829
2017	91.132
2018	103.599
2019	93.545
2020	93.034
2021	92.077
2022	91.61
2023	90.94
2024	89.051