Year	Index (Units)
1980	3.475
1981	4.008
1982	4.558
1983	5.142
1984	5.725
1985	6.675
1986	7.883
1987	9.183
1988	10.358
1989	11.875
1990	13.583
1991	15.642
1992	17.833
1993	19.567
1994	21.283
1995	23.167
1996	24.867
1997	27.008
1998	28.892
1999	30.375
2000	31.992
2001	33.817
2002	36.875
2003	39.058
2004	39.600
2005	40.933
2006	42.842
2007	45.900
2008	50.958
2009	54.617
2010	56.917
2011	59.758
2012	63.133
2013	66.758
2014	70.833
2015	74.083
2016	78.775
2017	82.933
2018	86.758
2019	90.333
2020	93.292
2021	97.542
2022	104.242
2023	110.392
2024	115.760
2025	120.969
2026	126.413
2027	132.101
2028	138.046
2029	144.258