Year	Index (Units)
1980	17.776
1981	18.220
1982	18.584
1983	18.956
1984	19.468
1985	21.279
1986	22.662
1987	24.316
1988	28.887
1989	34.087
1990	35.217
1991	36.471
1992	38.790
1993	44.463
1994	55.250
1995	64.514
1996	69.870
1997	71.811
1998	71.250
1999	70.252
2000	70.496
2001	71.007
2002	70.461
2003	71.281
2004	74.057
2005	75.397
2006	76.503
2007	80.154
2008	84.838
2009	84.251
2010	87.057
2011	91.772
2012	94.176
2013	96.650
2014	98.578
2015	100.000
2016	101.996
2017	103.606
2018	105.774
2019	108.847
2020	111.559
2021	112.583
2022	114.807
2023	115.068
2024	116.185
2025	118.500
2026	120.811
2027	123.168
2028	125.570
2029	128.020