Year	Index (Units)
1980	2.857
1981	3.112
1982	3.330
1983	3.628
1984	4.012
1985	4.422
1986	4.900
1987	2.424
1988	1.585
1989	1.482
1990	1.895
1991	2.017
1992	2.015
1993	3.205
1994	12.044
1995	17.061
1996	18.762
1997	21.150
1998	24.145
1999	25.842
2000	28.699
2001	32.502
2002	34.971
2003	40.224
2004	50.008
2005	56.719
2006	62.013
2007	67.689
2008	74.283
2009	82.488
2010	88.587
2011	92.415
2012	100.000
2013	108.077
2014	111.686
2015	116.098
2016	133.698
2017	152.423
2018	163.518
2019	192.216
2020	231.775
2021	276.605
2022	358.991
2023	518.586
2024	632.675
2025	695.301
2026	749.091
2027	805.273
2028	865.668
2029	930.593