Year	Index
1980	9.237
1981	11.68
1982	13.244
1983	14.23
1984	15.017
1985	16.266
1986	16.972
1987	17.094
1988	17.709
1989	20.119
1990	22.273
1991	25.128
1992	25.846
1993	29.797
1994	31.982
1995	33.91
1996	36.132
1997	38.6
1998	41.228
1999	44.065
2000	45.924
2001	48.4
2002	51.504
2003	52.887
2004	55.378
2005	58.113
2006	63.292
2007	68.878
2008	75.575
2009	77.482
2010	79.747
2011	84.956
2012	88.235
2013	91.354
2014	94.3
2015	95.502
2016	96.456
2017	100
2018	103.231
2019	105.373
2020	109.262
2021	113.103
2022	116.98
2023	120.939
2024	125.006