Year	Index (Units)
1980	0.770
1981	1.270
1982	2.320
1983	2.560
1984	3.010
1985	3.340
1986	3.850
1987	4.490
1988	5.620
1989	6.180
1990	7.870
1991	9.207
1992	10.769
1993	11.743
1994	14.075
1995	17.251
1996	19.647
1997	21.848
1998	24.548
1999	27.030
2000	29.800
2001	33.065
2002	36.267
2003	39.846
2004	45.077
2005	51.422
2006	56.273
2007	62.353
2008	71.022
2009	73.896
2010	78.200
2011	81.903
2012	85.630
2013	88.781
2014	93.333
2015	92.580
2016	93.288
2017	95.689
2018	97.629
2019	99.115
2020	100.000
2021	103.299
2022	111.436
2023	109.469
2024	111.649
2025	115.045
2026	118.496
2027	122.051
2028	125.713
2029	129.484