Year	Index
1980	64.52
1981	65.025
1982	67.271
1983	69.606
1984	72.034
1985	74.559
1986	77.184
1987	79.914
1988	69.515
1989	61.422
1990	62.339
1991	66.922
1992	65.089
1993	65.089
1994	53.222
1995	68.549
1996	72.32
1997	83.891
1998	81.793
1999	84.902
2000	82.27
2001	89.127
2002	86.581
2003	92.386
2004	93.408
2005	96.26
2006	113.685
2007	109.212
2008	122.113
2009	119.948
2010	123.106
2011	125.303
2012	134.662
2013	137.472
2014	138.127
2015	143.782
2016	143.731
2017	146.296
2018	147.609
2019	150.612
2020	154.39
2021	158.572
2022	163.329
2023	168.229
2024	173.276