Year	Index (Units)
1980	0.227
1981	0.246
1982	0.264
1983	0.275
1984	0.285
1985	0.316
1986	0.375
1987	0.576
1988	0.618
1989	0.623
1990	0.759
1991	0.838
1992	1.017
1993	1.823
1994	4.426
1995	5.496
1996	5.652
1997	5.995
1998	6.670
1999	10.707
2000	13.872
2001	18.639
2002	21.531
2003	26.483
2004	28.900
2005	32.940
2006	36.656
2007	39.012
2008	44.734
2009	44.599
2010	47.698
2011	56.133
2012	58.945
2013	60.075
2014	62.108
2015	66.391
2016	103.238
2017	125.975
2018	134.717
2019	140.633
2020	189.700
2021	301.850
2022	460.164
2023	697.526
2024	842.198
2025	966.957
2026	1061.025
2027	1141.365
2028	1198.433
2029	1258.355