Year	Index
1980	48.729
1981	50.654
1982	47.671
1983	43.096
1984	41.698
1985	40.447
1986	34.667
1987	38.11
1988	35.194
1989	38.193
1990	43.939
1991	40.215
1992	40.697
1993	38.469
1994	38.304
1995	39.039
1996	41.997
1997	41.004
1998	35.285
1999	39.179
2000	46.001
2001	43.902
2002	45.967
2003	50.722
2004	57.32
2005	70.197
2006	79.764
2007	86.357
2008	115.502
2009	86.479
2010	100
2011	116.245
2012	120.014
2013	117.419
2014	119.14
2015	96.767
2016	88.194
2017	95.557
2018	108.759
2019	103.934
2020	103.646
2021	104.752
2022	106.594
2023	108.703
2024	110.885