Year	Index (Units)
1980	19.555
1981	21.408
1982	23.767
1983	26.125
1984	28.358
1985	29.367
1986	30.417
1987	32.142
1988	34.658
1989	38.200
1990	42.142
1991	46.858
1992	51.350
1993	55.867
1994	60.792
1995	66.283
1996	70.475
1997	74.575
1998	76.683
1999	73.642
2000	70.900
2001	69.758
2002	67.633
2003	65.883
2004	65.642
2005	66.242
2006	67.567
2007	68.942
2008	71.908
2009	72.325
2010	73.983
2011	77.908
2012	81.067
2013	84.583
2014	88.325
2015	90.967
2016	93.158
2017	94.550
2018	96.825
2019	99.617
2020	99.867
2021	101.433
2022	103.342
2023	105.508
2024	107.935
2025	110.364
2026	113.012
2027	115.838
2028	118.734
2029	121.702