Year	Index
1980	36.731
1981	45.657
1982	50.405
1983	51.222
1984	55.531
1985	54.937
1986	53.154
1987	49.625
1988	49.922
1989	49.514
1990	48.511
1991	49.238
1992	46.328
1993	46.176
1994	62.584
1995	69.38
1996	73.084
1997	75.225
1998	78.644
1999	76.849
2000	79.09
2001	82.177
2002	84.37
2003	82.774
2004	83.243
2005	89.755
2006	89.803
2007	89.855
2008	100.003
2009	104.301
2010	101.396
2011	104.38
2012	104.866
2013	107.27
2014	106.264
2015	107.333
2016	107.523
2017	110.089
2018	113.397
2019	116.118
2020	118.557
2021	120.928
2022	123.346
2023	125.813
2024	128.33