Year	Index
1988	6.569
1989	7.758
1990	10.35
1991	13.682
1992	16.637
1993	20.148
1994	24.419
1995	31.33
1996	37.52
1997	44.44
1998	49.02
1999	54.5
2000	59.99
2001	64.08
2002	67.17
2003	70.97
2004	74.89
2005	77.39
2006	82.45
2007	88.53
2008	91.63
2009	96.72
2010	101.24
2011	105.36
2012	110.62
2013	111.08
2014	110.05
2015	111.028
2016	113.075
2017	115.495
2018	118.67
2019	122.765
2020	126.497
2021	130.277
2022	134.238
2023	138.251
2024	142.455