Year	Index (Units)
1980	16.742
1981	28.361
1982	30.433
1983	32.661
1984	38.317
1985	36.058
1986	32.294
1987	30.648
1988	33.026
1989	32.762
1990	32.652
1991	30.363
1992	29.003
1993	27.689
1994	41.692
1995	46.295
1996	51.650
1997	53.604
1998	57.222
1999	52.888
2000	55.686
2001	63.369
2002	64.578
2003	64.616
2004	70.917
2005	87.277
2006	95.871
2007	98.928
2008	106.065
2009	98.518
2010	102.958
2011	110.126
2012	111.042
2013	106.443
2014	107.913
2015	101.536
2016	100.394
2017	100.000
2018	103.738
2019	99.920
2020	98.047
2021	104.773
2022	116.780
2023	116.174
2024	119.577
2025	121.558
2026	125.035
2027	128.948
2028	133.112
2029	137.504