Year	Index
1980	3.371
1981	3.523
1982	3.77
1983	4.011
1984	4.358
1985	4.664
1986	4.911
1987	5.337
1988	6.179
1989	7.227
1990	9.32
1991	12.511
1992	15.383
1993	18.836
1994	22.39
1995	28.727
1996	35.467
1997	41.955
1998	47.899
1999	52.699
2000	57.855
2001	63.153
2002	66.478
2003	69.578
2004	74.275
2005	76.916
2006	79.928
2007	86.295
2008	91.517
2009	95.361
2010	100.003
2011	103.923
2012	109.813
2013	111.703
2014	111.455
2015	111.377
2016	111.843
2017	114.536
2018	117.799
2019	121.608
2020	125.319
2021	129.048
2022	132.871
2023	136.865
2024	140.938