Year	Index (Units)
1980	0.057
1981	0.073
1982	0.117
1983	0.236
1984	0.390
1985	0.615
1986	1.147
1987	2.661
1988	5.682
1989	6.814
1990	8.630
1991	10.581
1992	12.223
1993	13.417
1994	14.354
1995	19.387
1996	26.046
1997	31.411
1998	36.410
1999	42.442
2000	46.468
2001	49.426
2002	51.916
2003	54.278
2004	56.826
2005	59.094
2006	61.241
2007	63.672
2008	66.938
2009	70.483
2010	73.411
2011	75.910
2012	79.031
2013	82.037
2014	85.335
2015	87.655
2016	90.127
2017	95.573
2018	100.254
2019	103.899
2020	107.429
2021	113.545
2022	122.513
2023	129.281
2024	134.478
2025	138.901
2026	143.072
2027	147.365
2028	151.786
2029	156.340