Year	Index
1980	9.171
1981	10.703
1982	14.797
1983	23.684
1984	37.78
1985	60.955
1986	52.718
1987	54.365
1988	54.182
1989	49.741
1990	53.216
1991	53.179
1992	54.678
1993	53.179
1994	76.443
1995	85.385
1996	85.383
1997	88.564
1998	94.398
1999	95.459
2000	101.775
2001	114.171
2002	121.25
2003	128.359
2004	134.898
2005	139.165
2006	144.464
2007	149.863
2008	158.06
2009	165.958
2010	174.969
2011	183.576
2012	188.283
2013	197.444
2014	202.527
2015	205.774
2016	209.89
2017	209.417
2018	214.841
2019	220.428
2020	226.379
2021	232.492
2022	239.001
2023	245.932
2024	253.31