Year	Index (Units)
1980	5.959
1981	6.580
1982	6.830
1983	7.433
1984	7.686
1985	8.069
1986	8.448
1987	8.844
1988	9.798
1989	10.335
1990	11.762
1991	13.251
1992	15.168
1993	16.629
1994	18.591
1995	20.837
1996	22.978
1997	25.840
1998	27.514
1999	28.528
2000	29.983
2001	30.744
2002	32.105
2003	32.721
2004	35.488
2005	38.588
2006	41.540
2007	44.446
2008	54.015
2009	59.937
2010	66.987
2011	75.905
2012	84.455
2013	89.399
2014	96.752
2015	99.807
2016	102.992
2017	107.041
2018	112.620
2019	121.630
2020	132.080
2021	144.890
2022	175.710
2023	227.370
2024	271.907
2025	297.704
2026	317.055
2027	337.642
2028	359.565
2029	382.912