Year	Index (Units)
1980	13.449
1981	13.875
1982	14.949
1983	15.545
1984	16.052
1985	16.319
1986	16.666
1987	17.040
1988	18.604
1989	20.744
1990	25.932
1991	32.748
1992	33.951
1993	37.655
1994	45.690
1995	56.525
1996	66.808
1997	78.040
1998	86.077
1999	92.598
2000	100.000
2001	108.084
2002	113.631
2003	120.176
2004	127.930
2005	137.242
2006	144.583
2007	154.162
2008	166.171
2009	178.890
2010	187.255
2011	201.875
2012	209.101
2013	211.974
2014	226.493
2015	242.196
2016	251.104
2017	262.436
2018	267.546
2019	278.587
2020	291.497
2021	302.576
2022	330.250
2023	352.615
2024	368.990
2025	385.683
2026	401.951
2027	417.849
2028	434.605
2029	451.982