Year	Index (Units)
1980	13.362
1981	15.540
1982	17.280
1983	19.094
1984	20.737
1985	22.416
1986	24.658
1987	27.074
1988	29.349
1989	32.753
1990	36.487
1991	41.084
1992	47.863
1993	54.755
1994	60.560
1995	66.918
1996	73.677
1997	80.234
1998	85.457
1999	92.137
2000	100.000
2001	106.565
2002	115.119
2003	125.692
2004	134.475
2005	146.054
2006	162.928
2007	174.459
2008	196.481
2009	212.412
2010	227.174
2011	246.422
2012	264.996
2013	280.583
2014	292.970
2015	301.918
2016	310.401
2017	320.632
2018	331.023
2019	340.109
2020	346.538
2021	369.683
2022	414.660
2023	435.989
2024	453.516
2025	473.924
2026	495.250
2027	517.537
2028	540.826
2029	565.163