Year	Index (Units)
1980	0.004
1981	0.006
1982	0.013
1983	0.019
1984	0.031
1985	0.059
1986	0.328
1987	1.510
1988	7.165
1989	14.027
1990	19.081
1991	34.693
1992	47.773
1993	51.776
1994	57.150
1995	66.823
1996	70.560
1997	72.744
1998	78.644
1999	81.863
2000	80.402
2001	80.049
2002	83.063
2003	85.646
2004	92.336
2005	100.000
2006	107.664
2007	116.683
2008	143.882
2009	153.512
2010	167.543
2011	198.849
2012	216.986
2013	231.290
2014	240.744
2015	242.302
2016	248.784
2017	257.544
2018	266.661
2019	274.114
2020	282.940
2021	288.137
2022	297.235
2023	306.904
2024	318.381
2025	329.311
2026	340.474
2027	352.016
2028	363.950
2029	376.288