Year	Index
1980	24.877
1981	27.492
1982	27.257
1983	29.05
1984	29.392
1985	29.564
1986	30.273
1987	30.952
1988	31.1
1989	32.134
1990	33.404
1991	34.083
1992	34.771
1993	34.654
1994	35.427
1995	35.606
1996	34.873
1997	35.502
1998	36.46
1999	38.757
2000	41.199
2001	43.671
2002	43.758
2003	45.202
2004	46.965
2005	47.27
2006	46.391
2007	48.861
2008	66.923
2009	88.174
2010	86.054
2011	88.256
2012	94.531
2013	98.633
2014	100
2015	104.042
2016	102.987
2017	105.931
2018	109.85
2019	113.536
2020	116.922
2021	120.452
2022	124.094
2023	127.817
2024	131.651