Year	Index (Units)
1980	23.273
1981	26.461
1982	27.739
1983	28.284
1984	28.976
1985	29.850
1986	30.265
1987	32.096
1988	34.402
1989	36.146
1990	39.521
1991	43.177
1992	45.102
1993	47.718
1994	50.375
1995	52.770
1996	55.369
1997	59.009
1998	61.349
1999	62.180
2000	63.908
2001	65.930
2002	68.391
2003	70.730
2004	72.877
2005	74.785
2006	76.348
2007	79.101
2008	82.375
2009	84.682
2010	87.251
2011	90.879
2012	92.175
2013	93.229
2014	94.006
2015	95.070
2016	96.342
2017	97.698
2018	98.988
2019	99.719
2020	100.330
2021	104.040
2022	109.260
2023	112.710
2024	115.190
2025	117.493
2026	119.843
2027	122.240
2028	124.685
2029	127.179