Year	Index (Units)
1980	26.918
1981	29.764
1982	31.514
1983	36.716
1984	36.515
1985	37.952
1986	39.694
1987	41.479
1988	41.545
1989	41.944
1990	40.717
1991	41.942
1992	42.638
1993	41.527
1994	55.404
1995	54.945
1996	64.016
1997	71.662
1998	70.168
1999	71.578
2000	70.906
2001	72.066
2002	75.689
2003	73.498
2004	72.095
2005	76.338
2006	75.952
2007	81.461
2008	88.853
2009	91.623
2010	91.537
2011	94.118
2012	95.765
2013	97.377
2014	97.845
2015	100.000
2016	100.000
2017	99.115
2018	99.566
2019	99.577
2020	101.368
2021	103.920
2022	107.722
2023	110.721
2024	113.157
2025	115.420
2026	117.728
2027	120.083
2028	122.485
2029	124.934