Year	Index (Units)
1980	0.062
1981	0.068
1982	0.084
1983	0.109
1984	0.141
1985	0.189
1986	0.267
1987	0.763
1988	1.155
1989	1.482
1990	2.181
1991	2.948
1992	4.555
1993	6.543
1994	10.244
1995	16.036
1996	19.137
1997	20.323
1998	20.129
1999	21.380
2000	23.826
2001	29.052
2002	31.701
2003	36.080
2004	39.352
2005	43.739
2006	47.839
2007	53.840
2008	60.210
2009	61.560
2010	72.300
2011	76.740
2012	78.290
2013	81.060
2014	82.620
2015	91.340
2016	110.660
2017	116.910
2018	121.030
2019	125.270
2020	129.680
2021	138.420
2022	152.660
2023	159.150
2024	166.671
2025	175.870
2026	185.543
2027	195.748
2028	206.514
2029	217.872