Year	Index (Units)
1980	0.064
1981	0.128
1982	0.297
1983	0.862
1984	4.698
1985	13.398
1986	16.031
1987	18.616
1988	21.669
1989	26.153
1990	30.759
1991	36.307
1992	39.709
1993	44.175
1994	50.560
1995	54.657
1996	60.443
1997	64.667
1998	70.243
1999	71.187
2000	71.187
2001	72.190
2002	76.879
2003	75.429
2004	76.340
2005	78.161
2006	78.085
2007	80.738
2008	83.809
2009	87.090
2010	89.408
2011	91.349
2012	92.842
2013	94.528
2014	94.343
2015	93.403
2016	93.214
2017	93.587
2018	94.333
2019	94.899
2020	94.240
2021	96.884
2022	101.983
2023	105.000
2024	107.754
2025	110.253
2026	112.562
2027	114.914
2028	117.210
2029	119.552