Year	Index
1991	47.917
1992	49.532
1993	51.731
1994	55.096
1995	57.788
1996	59.818
1997	61.325
1998	62.677
1999	62.426
2000	63.165
2001	64.359
2002	65.263
2003	66.301
2004	67.918
2005	70.147
2006	72.612
2007	76.893
2008	83.606
2009	88.246
2010	90.44
2011	95.18
2012	99.198
2013	100.252
2014	102.511
2015	103.401
2016	103.796
2017	104.587
2018	104.445
2019	105.268
2020	106.48
2021	107.971
2022	109.591
2023	111.235
2024	112.903