Year	Index
1980	32.251
1981	27.339
1982	31.142
1983	34.901
1984	38.839
1985	39.911
1986	38.246
1987	39.648
1988	39.547
1989	40.272
1990	38.736
1991	39.029
1992	40.209
1993	41.166
1994	55.586
1995	63.979
1996	68.398
1997	70.907
1998	74.617
1999	81.754
2000	85.309
2001	86.983
2002	90.086
2003	92.838
2004	93.557
2005	97.566
2006	99.607
2007	99.997
2008	106.431
2009	109.131
2010	110.091
2011	114.211
2012	123.004
2013	124.718
2014	124.414
2015	124.506
2016	124.147
2017	124.196
2018	125.248
2019	127.54
2020	129.844
2021	132.212
2022	134.624
2023	137.153
2024	139.851