Year	Index (Units)
1980	20.685
1981	21.538
1982	24.280
1983	28.016
1984	34.930
1985	43.822
1986	66.741
1987	76.964
1988	86.521
1989	93.783
1990	103.619
1991	115.590
1992	120.498
1993	126.677
1994	133.065
1995	138.440
1996	141.559
1997	141.996
1998	148.782
1999	151.385
2000	151.693
2001	163.932
2002	185.252
2003	217.789
2004	235.407
2005	246.814
2006	247.859
2007	262.780
2008	280.741
2009	288.371
2010	305.063
2011	318.432
2012	334.059
2013	352.684
2014	377.193
2015	402.340
2016	434.025
2017	464.169
2018	493.925
2019	531.835
2020	561.965
2021	604.714
2022	687.795
2023	806.784
2024	911.225
2025	985.034
2026	1034.286
2027	1086.000
2028	1140.300
2029	1197.315