Year	Index
1980	7.169
1981	7.392
1982	8.755
1983	8.911
1984	9.439
1985	9.26
1986	9.479
1987	9.753
1988	9.977
1989	10.05
1990	10.657
1991	12.939
1992	14.814
1993	15.931
1994	22.678
1995	31.908
1996	34.697
1997	40.459
1998	38.049
1999	38.798
2000	41.096
2001	41.006
2002	43.534
2003	46.876
2004	51.681
2005	54.579
2006	61.204
2007	65.231
2008	79.793
2009	84.37
2010	84.561
2011	91.61
2012	95.169
2013	98.638
2014	100.723
2015	105.287
2016	112.956
2017	113.707
2018	114.998
2019	120.748
2020	126.786
2021	133.125
2022	139.781
2023	146.77
2024	154.109