Year	Index (Units)
1980	48.865
1981	53.530
1982	52.889
1983	50.643
1984	50.453
1985	48.051
1986	37.417
1987	41.034
1988	47.865
1989	49.426
1990	50.718
1991	52.019
1992	50.735
1993	51.868
1994	53.818
1995	55.896
1996	56.293
1997	57.038
1998	52.003
1999	53.188
2000	59.405
2001	58.764
2002	59.366
2003	64.473
2004	71.560
2005	81.388
2006	88.586
2007	96.057
2008	106.978
2009	93.076
2010	100.000
2011	109.737
2012	113.045
2013	113.480
2014	111.583
2015	101.256
2016	101.506
2017	107.108
2018	111.779
2019	111.873
2020	105.085
2021	116.239
2022	125.188
2023	122.795
2024	124.180
2025	125.364
2026	127.130
2027	129.253
2028	131.645
2029	134.214