Year	Index
1980	8.134
1981	9.203
1982	10.399
1983	11.122
1984	12.336
1985	13.497
1986	14.185
1987	15.816
1988	18.475
1989	19.113
1990	25.631
1991	27.489
1992	31.105
1993	36.399
1994	44.072
1995	48.181
1996	54.663
1997	60.208
1998	65.834
1999	70.332
2000	73.366
2001	82.532
2002	92.414
2003	93.711
2004	100
2005	105.328
2006	112.283
2007	116.253
2008	129.521
2009	138.921
2010	148.383
2011	170.081
2012	178.597
2013	182.776
2014	187.335
2015	193.105
2016	200.113
2017	205.563
2018	214.247
2019	221.553
2020	229.3
2021	238.712
2022	248.098
2023	259.423
2024	269.857