Year	Index
1980	3.508
1981	3.894
1982	4.206
1983	4.427
1984	5.532
1985	5.226
1986	5.458
1987	5.73
1988	6.037
1989	6.761
1990	7.487
1991	8.111
1992	8.397
1993	9.701
1994	10.978
1995	13.082
1996	17.972
1997	22.754
1998	22.478
1999	27.205
2000	31.039
2001	32.183
2002	33.239
2003	36.846
2004	41.292
2005	41.736
2006	45.493
2007	52.178
2008	65.574
2009	68.609
2010	71.409
2011	82.017
2012	91.728
2013	100
2014	103.745
2015	111.144
2016	121.7
2017	134.535
2018	141.686
2019	154.401
2020	168.258
2021	183.357
2022	199.812
2023	217.744
2024	237.285