Year	Index (Units)
1980	21.318
1981	23.474
1982	26.309
1983	28.597
1984	30.302
1985	31.902
1986	33.852
1987	36.275
1988	39.565
1989	42.552
1990	44.684
1991	45.306
1992	45.877
1993	46.384
1994	47.002
1995	48.325
1996	49.300
1997	49.761
1998	50.264
1999	50.713
2000	52.958
2001	54.817
2002	56.382
2003	58.108
2004	60.117
2005	62.898
2006	66.098
2007	69.002
2008	73.368
2009	73.667
2010	77.578
2011	81.215
2012	80.790
2013	81.830
2014	82.054
2015	81.440
2016	82.121
2017	85.095
2018	87.036
2019	89.963
2020	91.032
2021	96.199
2022	104.304
2023	107.877
2024	111.624
2025	115.219
2026	118.484
2027	121.710
2028	124.870
2029	127.956