Year	Index (Units)
1981	67.905
1982	67.905
1983	68.697
1984	70.825
1985	72.335
1986	73.623
1987	74.541
1988	75.431
1989	76.414
1990	78.049
1991	79.297
1992	80.312
1993	83.727
1994	85.789
1995	90.907
1996	92.722
1997	94.309
1998	93.893
1999	93.502
2000	94.959
2001	95.525
2002	93.314
2003	93.594
2004	94.356
2005	95.530
2006	95.683
2007	96.609
2008	98.623
2009	99.644
2010	100.000
2011	100.138
2012	100.250
2013	100.640
2014	100.432
2015	99.941
2016	99.663
2017	98.406
2018	99.415
2019	99.027
2020	100.948
2021	102.698
2022	106.480
2023	106.874
2024	108.263
2025	109.346
2026	110.439
2027	111.544
2028	112.659
2029	113.786