Year	Index
1980	41.301
1981	42.027
1982	44.008
1983	47.291
1984	50.213
1985	54.197
1986	57.254
1987	60.514
1988	63.236
1989	68.553
1990	70.752
1991	76.166
1992	79.507
1993	81.637
1994	87.874
1995	88.563
1996	91.455
1997	92.776
1998	95.133
1999	97.545
2000	95.807
2001	97.803
2002	98.577
2003	95.502
2004	99.123
2005	97.687
2006	100
2007	101.525
2008	103.057
2009	111.305
2010	111.635
2011	113.517
2012	111.29
2013	115.562
2014	115.223
2015	121.164
2016	128.283
2017	129.003
2018	130.757
2019	132.858
2020	135.185
2021	137.73
2022	140.484
2023	143.294
2024	146.16