Year	Index (Units)
1981	55.424
1982	54.066
1983	50.288
1984	50.464
1985	52.915
1986	39.317
1987	43.558
1988	44.849
1989	44.075
1990	44.563
1991	44.393
1992	45.193
1993	41.502
1994	38.999
1995	42.174
1996	48.719
1997	46.413
1998	38.453
1999	45.409
2000	54.730
2001	50.506
2002	53.106
2003	55.719
2004	62.055
2005	75.565
2006	87.788
2007	91.570
2008	108.659
2009	90.006
2010	100.000
2011	117.228
2012	126.004
2013	126.286
2014	117.751
2015	87.185
2016	81.223
2017	94.407
2018	105.054
2019	104.562
2020	86.305
2021	110.234
2022	135.962
2023	123.437
2024	124.669
2025	122.332
2026	121.630
2027	121.879
2028	122.707
2029	124.076