Year	Index (Units)
1980	51.375
1981	56.689
1982	57.157
1983	57.811
1984	58.338
1985	58.739
1986	57.930
1987	58.814
1988	59.641
1989	61.616
1990	63.969
1991	65.808
1992	66.986
1993	68.697
1994	70.672
1995	71.267
1996	72.692
1997	74.181
1998	73.121
1999	73.616
2000	75.135
2001	74.693
2002	75.019
2003	75.578
2004	76.569
2005	77.534
2006	78.161
2007	81.147
2008	85.501
2009	85.050
2010	88.954
2011	93.877
2012	97.936
2013	99.404
2014	99.328
2015	98.693
2016	98.854
2017	99.225
2018	99.686
2019	100.445
2020	100.469
2021	104.439
2022	111.186
2023	115.343
2024	118.688
2025	121.655
2026	124.062
2027	126.523
2028	129.033
2029	131.568