Year	Index
1980	31.906
1981	36.126
1982	38.55
1983	43.383
1984	46.654
1985	51.069
1986	53.306
1987	54.584
1988	55.427
1989	58.535
1990	62.951
1991	68.098
1992	70.751
1993	74.96
1994	79.227
1995	82.514
1996	85.743
1997	87.04
1998	88.972
1999	89.779
2000	91.278
2001	92.835
2002	94.161
2003	95.833
2004	96.352
2005	98.371
2006	101.6
2007	103.618
2008	108
2009	106.3
2010	108.6
2011	109.6
2012	112.446
2013	112.869
2014	114.643
2015	115.384
2016	117.482
2017	119.8
2018	120.229
2019	121.912
2020	124.35
2021	126.837
2022	129.374
2023	131.962
2024	134.601