Year	Index (Units)
1980	4.221
1981	4.776
1982	5.397
1983	5.772
1984	6.402
1985	7.005
1986	7.922
1987	8.833
1988	10.318
1989	11.859
1990	12.891
1991	14.824
1992	16.425
1993	17.936
1994	20.321
1995	22.274
1996	24.896
1997	26.904
1998	30.228
1999	32.632
2000	34.893
2001	37.555
2002	41.072
2003	45.211
2004	48.337
2005	51.977
2006	57.817
2007	62.242
2008	73.033
2009	78.267
2010	78.975
2011	84.833
2012	89.850
2013	94.567
2014	99.575
2015	99.008
2016	99.500
2017	100.000
2018	103.475
2019	105.167
2020	108.283
2021	108.167
2022	114.124
2023	119.248
2024	123.416
2025	127.369
2026	131.298
2027	135.335
2028	139.403
2029	143.641