Year	Index (Units)
1980	37.685
1981	41.077
1982	45.635
1983	48.949
1984	49.380
1985	50.427
1986	47.227
1987	47.811
1988	49.441
1989	51.830
1990	52.768
1991	50.674
1992	50.789
1993	50.057
1994	57.385
1995	61.270
1996	61.483
1997	62.440
1998	67.398
1999	70.388
2000	69.811
2001	72.577
2002	74.795
2003	75.906
2004	75.975
2005	78.816
2006	78.293
2007	80.245
2008	87.595
2009	89.702
2010	93.092
2011	99.365
2012	105.152
2013	102.913
2014	102.275
2015	100.000
2016	102.600
2017	104.000
2018	105.300
2019	106.100
2020	113.100
2021	112.900
2022	119.832
2023	121.550
2024	124.214
2025	126.880
2026	129.619
2027	132.425
2028	135.297
2029	138.235