Year	Index
1980	38.759
1981	41.909
1982	44.604
1983	48.117
1984	57.884
1985	60.819
1986	52.88
1987	51.437
1988	59.101
1989	56.205
1990	56.486
1991	58.858
1992	56.621
1993	50.464
1994	71.292
1995	75.116
1996	83.627
1997	88.287
1998	92.047
1999	84.271
2000	87.493
2001	98.369
2002	103.476
2003	101.663
2004	96.78
2005	100
2006	108.069
2007	100.028
2008	108.342
2009	119.309
2010	116.792
2011	118.963
2012	128.121
2013	128.41
2014	130.562
2015	139.385
2016	137.821
2017	136.533
2018	139.924
2019	143.971
2020	148.271
2021	152.785
2022	157.416
2023	162.135
2024	166.097