Year	Index (Units)
1980	2.995
1981	4.519
1982	6.825
1983	12.576
1984	16.244
1985	21.504
1986	26.078
1987	30.971
1988	38.855
1989	44.490
1990	51.392
1991	54.891
1992	57.064
1993	59.394
1994	60.315
1995	61.313
1996	62.694
1997	63.820
1998	64.907
1999	66.997
2000	70.427
2001	74.931
2002	78.810
2003	80.435
2004	82.970
2005	86.289
2006	92.048
2007	96.712
2008	108.975
2009	122.058
2010	128.642
2011	133.775
2012	140.725
2013	146.192
2014	149.167
2015	151.600
2016	154.167
2017	156.892
2018	161.092
2019	165.933
2020	170.658
2021	178.267
2022	193.075
2023	209.950
2024	221.727
2025	229.332
2026	235.146
2027	241.025
2028	247.050
2029	253.226