Year	Index (Units)
1980	6.794
1981	8.323
1982	9.909
1983	11.906
1984	14.055
1985	17.543
1986	20.526
1987	23.761
1988	27.080
1989	31.101
1990	38.218
1991	45.104
1992	51.600
1993	57.799
1994	63.964
1995	68.962
1996	73.755
1997	77.106
1998	79.956
1999	81.805
2000	84.807
2001	87.797
2002	90.868
2003	93.683
2004	96.615
2005	100.000
2006	103.199
2007	107.178
2008	109.528
2009	112.320
2010	118.113
2011	120.684
2012	121.068
2013	118.869
2014	115.856
2015	116.310
2016	116.647
2017	117.776
2018	118.520
2019	119.765
2020	116.903
2021	121.999
2022	131.235
2023	136.075
2024	139.720
2025	142.574
2026	145.395
2027	148.186
2028	150.969
2029	153.838