Year	Index
1980	21.501
1981	25.945
1982	31.591
1983	37.236
1984	40.84
1985	43.242
1986	48.047
1987	49.849
1988	51.651
1989	54.053
1990	60.059
1991	66.433
1992	75.674
1993	78.983
1994	82.1
1995	86.785
1996	94.687
1997	95.062
1998	103.011
1999	101.395
2000	100.349
2001	104.926
2002	108.056
2003	105.591
2004	105.276
2005	107.128
2006	113.355
2007	117.184
2008	125.002
2009	124.541
2010	128.807
2011	133.42
2012	138.955
2013	139.071
2014	138.494
2015	137.781
2016	137.419
2017	137.892
2018	139.976
2019	142.215
2020	145.059
2021	147.961
2022	150.92
2023	153.938
2024	157.017