Year	Index
1980	16.997
1981	17.522
1982	17.596
1983	17.791
1984	18.663
1985	20.549
1986	21.528
1987	22.623
1988	25.349
1989	27.544
1990	29.118
1991	30.94
1992	33.444
1993	38.564
1994	46.371
1995	52.656
1996	56.137
1997	57.056
1998	56.54
1999	55.827
2000	57.032
2001	58.249
2002	58.69
2003	60.345
2004	64.489
2005	67.358
2006	69.882
2007	75.16
2008	80.752
2009	80.87
2010	85.826
2011	92.756
2012	95.684
2013	97.944
2014	98.96
2015	100
2016	99.925
2017	102.341
2018	104.488
2019	106.429
2020	108.79
2021	111.043
2022	113.421
2023	116.071
2024	118.711