Year	Index (Units)
1980	31.138
1981	36.264
1982	39.020
1983	39.260
1984	41.726
1985	43.686
1986	47.205
1987	49.877
1988	53.567
1989	56.254
1990	60.326
1991	58.566
1992	62.828
1993	64.990
1994	68.901
1995	71.747
1996	72.285
1997	75.799
1998	78.208
1999	79.878
2000	78.874
2001	81.502
2002	84.336
2003	85.743
2004	89.038
2005	87.589
2006	100.000
2007	106.324
2008	107.900
2009	111.183
2010	111.772
2011	118.098
2012	117.192
2013	117.517
2014	119.001
2015	118.633
2016	120.170
2017	126.235
2018	125.785
2019	124.363
2020	116.211
2021	113.891
2022	118.645
2023	125.854
2024	127.608
2025	130.294
2026	132.957
2027	135.675
2028	138.447
2029	141.277