Year	Index (Units)
1980	0.006
1981	0.012
1982	0.024
1983	0.059
1984	0.069
1985	0.138
1986	0.337
1987	1.063
1988	2.835
1989	6.543
1990	9.514
1991	11.495
1992	16.351
1993	21.251
1994	22.495
1995	24.021
1996	25.827
1997	27.823
1998	29.446
1999	31.142
2000	32.195
2001	32.814
2002	32.715
2003	35.565
2004	36.869
2005	40.040
2006	42.931
2007	45.545
2008	51.031
2009	57.673
2010	59.970
2011	71.160
2012	81.130
2013	85.565
2014	89.236
2015	92.531
2016	97.314
2017	102.741
2018	105.360
2019	107.612
2020	110.580
2021	113.020
2022	121.149
2023	127.633
2024	132.496
2025	138.952
2026	145.950
2027	153.248
2028	160.910
2029	168.956