Year	Index (Units)
1980	1.865
1981	2.000
1982	2.150
1983	2.292
1984	2.846
1985	3.938
1986	4.308
1987	4.929
1988	7.075
1989	8.745
1990	13.158
1991	20.823
1992	21.982
1993	23.078
1994	25.417
1995	27.870
1996	28.893
1997	31.624
1998	33.681
1999	34.972
2000	37.493
2001	39.758
2002	42.509
2003	56.734
2004	82.358
2005	87.119
2006	92.905
2007	100.000
2008	110.392
2009	114.253
2010	120.473
2011	130.184
2012	136.821
2013	143.241
2014	149.431
2015	153.125
2016	156.178
2017	162.708
2018	169.414
2019	173.693
2020	181.897
2021	196.044
2022	217.048
2023	227.436
2024	237.055
2025	246.472
2026	256.263
2027	266.443
2028	277.028
2029	288.033