Year	Index (Units)
1980	24.582
1981	27.600
1982	29.494
1983	31.102
1984	32.688
1985	33.459
1986	33.305
1987	35.398
1988	36.962
1989	39.385
1990	40.728
1991	44.032
1992	45.486
1993	45.046
1994	45.406
1995	46.694
1996	47.538
1997	49.227
1998	50.071
1999	51.537
2000	52.115
2001	53.917
2002	53.352
2003	54.381
2004	55.309
2005	59.191
2006	63.695
2007	65.640
2008	72.772
2009	74.392
2010	77.580
2011	85.792
2012	87.846
2013	90.330
2014	92.571
2015	91.182
2016	93.463
2017	96.921
2018	98.900
2019	101.300
2020	101.700
2021	103.900
2022	109.800
2023	115.100
2024	118.224
2025	121.267
2026	124.210
2027	127.224
2028	130.311
2029	133.473