Year	Index (Units)
1980	22.912
1981	27.121
1982	31.700
1983	35.197
1984	37.769
1985	40.244
1986	42.687
1987	44.018
1988	45.653
1989	47.951
1990	48.268
1991	49.411
1992	50.809
1993	53.485
1994	54.288
1995	57.377
1996	57.770
1997	60.101
1998	64.040
1999	66.843
2000	71.439
2001	76.338
2002	80.298
2003	83.439
2004	83.868
2005	86.446
2006	89.403
2007	90.475
2008	90.018
2009	85.855
2010	83.374
2011	84.500
2012	86.281
2013	87.258
2014	87.418
2015	94.673
2016	95.226
2017	96.418
2018	97.496
2019	100.768
2020	99.525
2021	100.000
2022	106.582
2023	109.743
2024	112.103
2025	114.372
2026	116.606
2027	118.905
2028	121.290
2029	123.716