Year	Index (Units)
1980	42.273
1981	45.299
1982	46.485
1983	47.932
1984	49.475
1985	49.119
1986	50.085
1987	53.001
1988	55.925
1989	58.654
1990	63.265
1991	65.293
1992	67.162
1993	66.796
1994	66.878
1995	66.032
1996	68.136
1997	67.371
1998	70.510
1999	71.284
2000	71.592
2001	72.261
2002	74.104
2003	75.445
2004	77.524
2005	79.495
2006	79.502
2007	83.661
2008	84.270
2009	86.292
2010	88.816
2011	92.408
2012	94.107
2013	95.103
2014	96.365
2015	97.233
2016	96.143
2017	98.408
2018	100.120
2019	100.810
2020	103.610
2021	104.870
2022	114.570
2023	118.330
2024	120.958
2025	123.373
2026	125.836
2027	128.349
2028	130.912
2029	133.525