Year	Index (Units)
1980	11.984
1981	13.711
1982	15.293
1983	16.918
1984	20.073
1985	23.728
1986	25.839
1987	30.038
1988	35.400
1989	38.459
1990	42.684
1991	46.763
1992	50.769
1993	57.470
1994	65.410
1995	72.038
1996	76.190
1997	82.099
1998	86.125
1999	93.961
2000	100.000
2001	110.784
2002	123.508
2003	129.231
2004	133.400
2005	143.539
2006	150.427
2007	165.181
2008	186.497
2009	194.891
2010	203.662
2011	219.472
2012	237.612
2013	248.111
2014	263.418
2015	276.353
2016	300.345
2017	314.479
2018	330.895
2019	337.522
2020	353.010
2021	365.202
2022	385.617
2023	402.242
2024	414.770
2025	427.254
2026	439.992
2027	453.346
2028	467.105
2029	481.282