Year	Index (Units)
1980	33.558
1981	37.027
1982	38.726
1983	40.319
1984	43.611
1985	44.425
1986	45.673
1987	46.699
1988	48.656
1989	50.026
1990	52.923
1991	56.377
1992	60.037
1993	61.930
1994	65.159
1995	66.226
1996	67.520
1997	70.060
1998	70.590
1999	73.080
2000	75.820
2001	77.460
2002	79.870
2003	81.710
2004	84.860
2005	86.070
2006	87.360
2007	90.710
2008	92.490
2009	94.130
2010	96.140
2011	100.350
2012	101.960
2013	100.800
2014	99.910
2015	99.420
2016	99.520
2017	99.130
2018	100.140
2019	100.850
2020	100.030
2021	104.850
2022	112.790
2023	114.990
2024	117.290
2025	119.636
2026	122.028
2027	124.347
2028	126.709
2029	129.117