Year	Index
1980	19.937
1981	24.06
1982	29.143
1983	35.017
1984	38.405
1985	40.664
1986	45.183
1987	46.877
1988	48.571
1989	50.831
1990	56.478
1991	60.764
1992	68.923
1993	72.94
1994	75.38
1995	81.719
1996	86.631
1997	94.059
1998	98.197
1999	102.462
2000	100
2001	103.674
2002	105.663
2003	106.918
2004	104.897
2005	105.351
2006	110.453
2007	115.307
2008	123.14
2009	124.358
2010	126.943
2011	132.622
2012	135.995
2013	138.052
2014	137.716
2015	137.891
2016	135.95
2017	137.015
2018	138.799
2019	140.986
2020	143.806
2021	146.682
2022	149.616
2023	152.608
2024	155.66