Year	Index (Units)
1980	0.047
1981	0.056
1982	0.067
1983	0.072
1984	0.084
1985	0.143
1986	0.279
1987	1.640
1988	4.182
1989	7.202
1990	12.158
1991	18.424
1992	40.533
1993	52.328
1994	56.498
1995	62.492
1996	68.028
1997	73.293
1998	76.284
1999	76.993
2000	75.450
2001	74.079
2002	77.736
2003	79.069
2004	79.870
2005	80.580
2006	81.290
2007	83.836
2008	90.154
2009	99.424
2010	100.000
2011	102.965
2012	110.673
2013	113.527
2014	113.646
2015	117.437
2016	118.461
2017	121.715
2018	128.438
2019	133.698
2020	215.332
2021	518.519
2022	1374.077