Year	Index (Units)
1980	6.573
1981	7.009
1982	7.377
1983	8.313
1984	9.199
1985	10.346
1986	11.576
1987	11.942
1988	12.974
1989	14.365
1990	21.170
1991	26.652
1992	35.101
1993	42.297
1994	54.563
1995	70.823
1996	84.067
1997	88.859
1998	93.258
1999	95.682
2000	95.969
2001	100.000
2002	102.100
2003	107.780
2004	110.140
2005	111.490
2006	115.770
2007	121.330
2008	127.230
2009	134.550
2010	138.216
2011	145.348
2012	158.480
2013	160.300
2014	168.720
2015	176.080
2016	188.330
2017	197.620
2018	202.960
2019	207.900
2020	215.210
2021	233.470
2022	255.170
2023	275.170
2024	294.344
2025	312.270
2026	330.549
2027	348.091
2028	365.725
2029	383.989