Year	Index (Units)
1980	20.783
1981	22.469
1982	23.930
1983	26.705
1984	32.127
1985	33.765
1986	28.363
1987	27.030
1988	31.057
1989	29.566
1990	30.575
1991	31.217
1992	29.094
1993	38.230
1994	44.075
1995	48.483
1996	53.573
1997	53.905
1998	55.792
1999	57.633
2000	65.152
2001	65.610
2002	73.848
2003	65.087
2004	71.087
2005	65.350
2006	70.550
2007	71.720
2008	78.646
2009	82.372
2010	80.596
2011	89.244
2012	91.086
2013	91.903
2014	95.308
2015	97.228
2016	92.779
2017	95.487
2018	99.629
2019	97.949
2020	103.534
2021	104.758
2022	108.207
2023	115.847
2024	119.265
2025	122.783
2026	126.405
2027	130.134
2028	133.973
2029	137.925