Year	Index
1988	51.2
1989	55.2
1990	59
1991	59.9
1992	60.1
1993	61.2
1994	62.9
1995	66
1996	67.1
1997	66.9
1998	67.9
1999	69.1
2000	73.1
2001	75.4
2002	77.7
2003	79.6
2004	81.7
2005	83.9
2006	86.7
2007	89.3
2008	92.6
2009	94.5
2010	97
2011	99.9
2012	102
2013	104.7
2014	106.5
2015	108.3
2016	109.8
2017	112
2018	114
2019	116.644
2020	119.35
2021	122.301
2022	125.418
2023	128.583
2024	131.828