Year	Index (Units)
1980	21.246
1981	24.306
1982	27.711
1983	31.101
1984	33.903
1985	36.676
1986	39.706
1987	41.530
1988	43.956
1989	46.986
1990	50.060
1991	52.826
1992	55.657
1993	58.399
1994	60.931
1995	63.563
1996	65.644
1997	66.877
1998	67.785
1999	69.669
2000	72.460
2001	74.280
2002	77.260
2003	79.340
2004	81.940
2005	84.990
2006	87.300
2007	91.040
2008	92.360
2009	93.190
2010	95.860
2011	98.110
2012	101.060
2013	101.370
2014	100.220
2015	100.090
2016	101.500
2017	102.740
2018	104.000
2019	104.880
2020	104.280
2021	111.130
2022	117.220
2023	121.060
2024	124.008
2025	126.741
2026	129.142
2027	131.466
2028	133.833
2029	136.242