Year	Index (Units)
1980	17.097
1981	18.492
1982	19.901
1983	21.257
1984	21.541
1985	22.472
1986	24.119
1987	23.967
1988	23.934
1989	27.656
1990	31.996
1991	36.330
1992	38.359
1993	39.457
1994	42.366
1995	43.110
1996	44.148
1997	44.576
1998	47.715
1999	47.642
2000	47.409
2001	47.970
2002	48.424
2003	49.387
2004	50.778
2005	52.064
2006	57.701
2007	60.529
2008	71.194
2009	73.445
2010	79.378
2011	84.069
2012	87.942
2013	93.345
2014	96.561
2015	98.656
2016	100.000
2017	101.784
2018	104.097
2019	104.976
2020	104.232
2021	106.529
2022	109.299
2023	111.485
2024	114.161
2025	117.015
2026	119.941
2027	122.939
2028	126.012
2029	129.163