Year	Index
1980	7.327
1981	8.285
1982	9.029
1983	9.504
1984	13.939
1985	17.175
1986	17.119
1987	17.64
1988	19.797
1989	22.048
1990	24.958
1991	29.783
1992	32.383
1993	34.55
1994	38.133
1995	40.742
1996	43.792
1997	46.225
1998	50.5
1999	53.517
2000	55.617
2001	59.383
2002	61.2
2003	63.308
2004	67.083
2005	72.25
2006	76.767
2007	78.9
2008	86.242
2009	89.025
2010	92.683
2011	97.092
2012	100.017
2013	102.6
2014	106.3
2015	107.017
2016	108.358
2017	111.45
2018	117.258
2019	121.758
2020	125.743
2021	129.588
2022	133.476
2023	137.48
2024	141.604