Year	Index (Units)
1980	0.109
1981	0.082
1982	0.096
1983	0.108
1984	0.127
1985	0.170
1986	0.191
1987	0.538
1988	0.798
1989	1.176
1990	2.194
1991	3.461
1992	4.769
1993	6.818
1994	10.243
1995	15.514
1996	23.088
1997	25.523
1998	27.094
1999	29.516
2000	32.945
2001	37.815
2002	41.533
2003	43.044
2004	45.538
2005	48.877
2006	52.524
2007	56.430
2008	59.337
2009	60.210
2010	64.814
2011	66.336
2012	68.442
2013	70.222
2014	70.985
2015	75.996
2016	85.238
2017	92.038
2018	95.531
2019	100.000
2020	103.172
2021	107.867
2022	114.771
2023	125.676
2024	128.493
2025	136.691
2026	144.614
2027	153.799
2028	163.124
2029	172.719