Year	Index (Units)
1980	31.415
1981	37.493
1982	40.731
1983	42.408
1984	44.479
1985	46.011
1986	48.209
1987	52.285
1988	52.817
1989	54.715
1990	58.435
1991	60.605
1992	61.725
1993	61.376
1994	62.778
1995	64.179
1996	66.617
1997	67.369
1998	69.286
1999	70.962
2000	70.693
2001	75.123
2002	75.617
2003	74.368
2004	77.427
2005	79.845
2006	83.158
2007	89.455
2008	91.452
2009	90.265
2010	95.108
2011	94.810
2012	95.957
2013	98.109
2014	97.774
2015	97.056
2016	96.476
2017	98.475
2018	100.000
2019	102.312
2020	101.426
2021	101.028
2022	103.937
2023	107.569
2024	110.695
2025	112.907
2026	115.163
2027	117.464
2028	119.811
2029	122.205