Year	Index (Units)
1980	52.866
1981	56.249
1982	57.677
1983	56.480
1984	52.324
1985	50.247
1986	54.087
1987	55.473
1988	56.354
1989	57.236
1990	62.966
1991	65.862
1992	66.492
1993	67.247
1994	66.807
1995	66.051
1996	66.378
1997	66.140
1998	66.423
1999	66.763
2000	65.964
2001	65.409
2002	65.222
2003	65.343
2004	65.838
2005	67.063
2006	69.212
2007	73.290
2008	82.495
2009	85.413
2010	88.194
2011	91.776
2012	94.475
2013	95.733
2014	96.879
2015	97.016
2016	97.877
2017	99.304
2018	100.003
2019	100.475
2020	100.078
2021	101.744
2022	104.299
2023	105.287
2024	106.656
2025	108.255
2026	110.421
2027	112.629
2028	114.882
2029	117.179