Year	Index (Units)
1980	9.225
1981	10.174
1982	11.090
1983	12.430
1984	13.029
1985	14.049
1986	15.246
1987	16.692
1988	17.464
1989	18.521
1990	21.302
1991	24.153
1992	25.561
1993	27.992
1994	30.737
1995	33.448
1996	37.004
1997	40.351
1998	43.976
1999	45.597
2000	46.933
2001	49.567
2002	51.933
2003	53.933
2004	56.300
2005	58.600
2006	62.567
2007	66.600
2008	72.633
2009	81.767
2010	88.767
2011	95.667
2012	105.700
2013	113.800
2014	119.800
2015	126.100
2016	130.600
2017	136.600
2018	139.967
2019	149.300
2020	156.567
2021	166.500
2022	176.833
2023	185.801
2024	194.035
2025	202.027
2026	210.294
2027	218.705
2028	227.454
2029	236.552