Year	Index (Units)
1980	29.254
1981	29.487
1982	30.683
1983	28.822
1984	31.781
1985	32.146
1986	32.279
1987	31.847
1988	32.944
1989	32.878
1990	33.243
1991	33.941
1992	34.793
1993	35.798
1994	55.132
1995	56.854
1996	60.785
1997	62.265
1998	66.253
1999	64.094
2000	69.821
2001	71.385
2002	72.657
2003	73.518
2004	75.672
2005	78.028
2006	83.002
2007	83.278
2008	89.543
2009	89.374
2010	93.109
2011	94.966
2012	101.509
2013	99.697
2014	98.962
2015	101.199
2016	98.405
2017	101.315
2018	101.180
2019	101.457
2020	102.633
2021	107.730
2022	110.841
2023	111.242
2024	114.579
2025	116.871
2026	119.208
2027	121.593
2028	124.024
2029	126.505