Year	Index (Units)
1980	24.604
1981	26.518
1982	28.033
1983	30.386
1984	31.622
1985	33.018
1986	35.769
1987	38.441
1988	40.036
1989	40.076
1990	40.116
1991	40.794
1992	42.249
1993	43.314
1994	57.261
1995	61.670
1996	63.829
1997	67.150
1998	68.486
1999	69.551
2000	72.059
2001	75.506
2002	78.827
2003	78.741
2004	82.240
2005	84.321
2006	86.038
2007	87.291
2008	89.481
2009	89.371
2010	93.930
2011	95.778
2012	99.043
2013	99.454
2014	100.374
2015	101.341
2016	102.031
2017	102.799
2018	103.418
2019	105.038
2020	107.466
2021	113.461
2022	119.225
2023	124.000
2024	127.720
2025	130.913
2026	133.269
2027	135.935
2028	138.654
2029	141.427