Year	Index (Units)
1980	26.311
1981	29.205
1982	32.057
1983	35.030
1984	37.760
1985	41.155
1986	43.516
1987	42.824
1988	42.223
1989	42.864
1990	42.856
1991	42.546
1992	42.151
1993	41.987
1994	55.835
1995	60.065
1996	63.182
1997	65.363
1998	67.796
1999	68.958
2000	69.861
2001	74.747
2002	76.171
2003	75.468
2004	75.366
2005	78.924
2006	81.202
2007	86.552
2008	93.663
2009	92.081
2010	93.559
2011	97.168
2012	100.349
2013	101.539
2014	100.000
2015	101.070
2016	102.036
2017	102.647
2018	101.785
2019	103.909
2020	105.436
2021	107.294
2022	116.532
2023	122.708
2024	127.297
2025	129.807
2026	132.427
2027	135.030
2028	139.262
2029	142.463