Year	Index (Units)
1980	31.655
1981	29.604
1982	31.199
1983	29.424
1984	21.234
1985	20.520
1986	20.622
1987	20.455
1988	23.436
1989	26.531
1990	38.492
1991	41.347
1992	42.761
1993	46.436
1994	50.989
1995	56.562
1996	60.282
1997	62.323
1998	64.960
1999	65.604
2000	67.752
2001	69.999
2002	71.054
2003	73.161
2004	75.149
2005	78.356
2006	81.727
2007	85.320
2008	88.358
2009	88.278
2010	90.623
2011	95.993
2012	98.421
2013	98.991
2014	100.000
2015	101.308
2016	101.998
2017	102.990
2018	104.724
2019	105.617
2020	106.316
2021	110.721
2022	118.630
2023	121.882
2024	122.915
2025	126.125
2026	129.170
2027	132.065
2028	134.801
2029	137.624