Year	Index (Units)
1980	0.818
1981	1.043
1982	1.302
1983	1.556
1984	1.809
1985	2.242
1986	2.664
1987	3.286
1988	4.209
1989	5.301
1990	6.844
1991	8.919
1992	11.329
1993	13.873
1994	17.043
1995	20.602
1996	24.888
1997	29.486
1998	34.985
1999	38.790
2000	42.366
2001	45.738
2002	48.642
2003	52.105
2004	55.183
2005	57.968
2006	60.463
2007	63.814
2008	68.282
2009	71.145
2010	72.758
2011	75.243
2012	77.632
2013	79.202
2014	81.503
2015	85.570
2016	91.993
2017	95.960
2018	99.070
2019	102.562
2020	105.152
2021	108.838
2022	119.921
2023	133.987
2024	142.549
2025	147.677
2026	152.171
2027	156.670
2028	161.375
2029	166.215