Year	Index (Units)
1980	15.498
1981	18.701
1982	22.770
1983	26.840
1984	29.437
1985	31.169
1986	34.632
1987	35.930
1988	37.229
1989	38.961
1990	43.290
1991	47.884
1992	54.545
1993	56.930
1994	59.177
1995	62.553
1996	68.250
1997	68.519
1998	74.249
1999	73.084
2000	72.330
2001	75.630
2002	77.885
2003	76.109
2004	75.881
2005	77.217
2006	81.705
2007	84.450
2008	90.063
2009	89.782
2010	92.870
2011	96.153
2012	100.134
2013	100.199
2014	99.860
2015	99.335
2016	99.087
2017	99.353
2018	100.350
2019	102.293
2020	101.420
2021	106.871
2022	114.969
2023	116.500
2024	118.830
2025	121.207
2026	123.631
2027	126.104
2028	128.626
2029	131.198