Year	Index (Units)
1980	0.457
1981	0.499
1982	0.533
1983	0.622
1984	0.816
1985	1.058
1986	1.316
1987	1.464
1988	1.584
1989	1.839
1990	2.295
1991	3.466
1992	6.144
1993	7.473
1994	10.130
1995	12.146
1996	15.354
1997	16.837
1998	18.290
1999	19.378
2000	20.942
2001	22.383
2002	23.948
2003	26.374
2004	29.940
2005	34.461
2006	37.397
2007	40.870
2008	49.872
2009	54.648
2010	61.543
2011	66.172
2012	70.733
2013	77.353
2014	83.754
2015	86.837
2016	88.877
2017	92.768
2018	96.237
2019	100.000
2020	105.210
2021	111.398
2022	122.925
2023	130.880
2024	140.042
2025	147.044
2026	154.455
2027	162.208
2028	170.319
2029	178.835