Year	Index (Units)
1980	32.462
1981	34.915
1982	39.125
1983	42.390
1984	44.445
1985	47.580
1986	46.295
1987	44.976
1988	46.861
1989	46.710
1990	46.333
1991	47.492
1992	46.546
1993	46.832
1994	58.409
1995	62.949
1996	66.794
1997	68.751
1998	72.127
1999	71.348
2000	71.227
2001	74.595
2002	76.310
2003	77.867
2004	77.556
2005	82.526
2006	84.454
2007	84.257
2008	93.246
2009	94.052
2010	93.480
2011	96.068
2012	99.735
2013	100.259
2014	100.000
2015	101.653
2016	102.102
2017	103.616
2018	105.643
2019	102.227
2020	104.153
2021	108.224
2022	123.136
2023	124.296
2024	126.907
2025	129.445
2026	132.034
2027	134.674
2028	137.368
2029	140.115