Year	Index (Units)
1980	25.993
1981	28.770
1982	31.576
1983	33.018
1984	36.192
1985	38.148
1986	39.569
1987	42.978
1988	46.761
1989	52.634
1990	56.616
1991	61.790
1992	67.907
1993	73.756
1994	78.418
1995	81.664
1996	86.469
1997	91.450
1998	92.566
1999	88.775
2000	85.761
2001	84.240
2002	81.374
2003	76.485
2004	73.739
2005	73.628
2006	73.235
2007	75.532
2008	76.500
2009	76.213
2010	76.419
2011	79.398
2012	82.212
2013	83.702
2014	86.088
2015	89.225
2016	90.687
2017	93.299
2018	96.713
2019	98.691
2020	99.321
2021	100.000
2022	101.690
2023	103.517
2024	108.319
2025	110.889
2026	113.508
2027	116.144
2028	118.866
2029	121.594