Year	Index (Units)
1980	28.647
1981	28.875
1982	30.047
1983	28.224
1984	31.121
1985	31.480
1986	31.610
1987	31.187
1988	32.261
1989	32.196
1990	32.554
1991	33.237
1992	35.205
1993	35.362
1994	48.989
1995	56.071
1996	58.829
1997	61.066
1998	64.581
1999	64.805
2000	67.420
2001	69.952
2002	71.872
2003	73.175
2004	74.152
2005	77.606
2006	81.613
2007	82.635
2008	88.255
2009	88.906
2010	90.986
2011	93.577
2012	100.127
2013	101.095
2014	100.017
2015	100.219
2016	99.423
2017	101.182
2018	102.041
2019	101.089
2020	104.171
2021	105.942
2022	107.425
2023	110.433
2024	113.746
2025	116.021
2026	118.341
2027	120.708
2028	123.122
2029	125.585