Year	Index (Units)
1980	19.207
1981	20.676
1982	22.250
1983	23.352
1984	24.297
1985	24.979
1986	24.979
1987	24.926
1988	26.598
1989	33.425
1990	38.837
1991	42.005
1992	43.692
1993	45.136
1994	46.726
1995	47.826
1996	50.935
1997	52.483
1998	54.098
1999	54.422
2000	54.789
2001	55.757
2002	56.780
2003	57.704
2004	59.646
2005	61.728
2006	65.589
2007	68.395
2008	77.089
2009	76.098
2010	79.850
2011	83.187
2012	87.021
2013	91.284
2014	94.012
2015	92.980
2016	92.400
2017	95.739
2018	100.000
2019	100.678
2020	101.077
2021	102.411
2022	106.737
2023	109.046
2024	112.012
2025	114.741
2026	117.583
2027	120.488
2028	123.459
2029	126.503