Year	Index (Units)
1980	25.782
1981	26.951
1982	29.097
1983	31.971
1984	34.444
1985	36.628
1986	38.913
1987	40.778
1988	43.506
1989	46.932
1990	51.294
1991	55.503
1992	56.140
1993	57.464
1994	58.951
1995	61.198
1996	61.816
1997	62.759
1998	63.269
1999	63.837
2000	64.798
2001	66.407
2002	67.435
2003	68.582
2004	68.810
2005	69.282
2006	70.500
2007	72.492
2008	74.837
2009	76.603
2010	77.329
2011	78.170
2012	78.953
2013	79.685
2014	81.075
2015	82.795
2016	84.058
2017	85.853
2018	87.911
2019	90.150
2020	91.948
2021	94.325
2022	100.000
2023	105.618
2024	108.707
2025	111.248
2026	113.473
2027	115.742
2028	118.057
2029	120.418