Year	Index (Units)
1980	74.776
1981	77.801
1982	79.700
1983	81.017
1984	82.878
1985	84.245
1986	84.056
1987	84.689
1988	85.586
1989	87.813
1990	90.992
1991	93.538
1992	94.456
1993	95.495
1994	96.268
1995	95.714
1996	96.217
1997	98.217
1998	98.742
1999	97.742
2000	96.993
2001	96.110
2002	95.595
2003	95.301
2004	95.803
2005	95.075
2006	95.424
2007	95.913
2008	96.942
2009	95.004
2010	94.762
2011	94.475
2012	94.244
2013	95.560
2014	97.998
2015	98.192
2016	98.454
2017	98.994
2018	99.853
2019	100.362
2020	99.442
2021	99.953
2022	103.822
2023	106.855
2024	109.004
2025	111.178
2026	113.406
2027	115.678
2028	117.996
2029	120.361