Year	Index (Units)
1980	22.856
1981	23.540
1982	25.491
1983	27.358
1984	31.915
1985	32.307
1986	31.806
1987	30.517
1988	30.221
1989	30.091
1990	28.729
1991	28.920
1992	28.914
1993	30.690
1994	45.212
1995	50.945
1996	53.282
1997	55.528
1998	57.549
1999	58.001
2000	59.304
2001	63.690
2002	67.936
2003	71.198
2004	69.140
2005	70.040
2006	71.261
2007	73.351
2008	79.588
2009	81.455
2010	85.843
2011	88.673
2012	90.315
2013	93.338
2014	96.987
2015	100.000
2016	98.821
2017	97.790
2018	99.436
2019	101.409
2020	103.261
2021	107.321
2022	111.566
2023	113.631
2024	116.289
2025	118.614
2026	120.987
2027	123.406
2028	125.875
2029	128.392