Year	Index (Units)
1980	32.548
1981	33.444
1982	34.431
1983	35.454
1984	36.514
1985	37.611
1986	38.748
1987	39.924
1988	34.530
1989	32.219
1990	31.959
1991	33.413
1992	32.524
1993	31.444
1994	43.057
1995	44.234
1996	50.633
1997	52.759
1998	42.690
1999	54.578
2000	77.448
2001	70.228
2002	72.477
2003	69.658
2004	83.818
2005	100.000
2006	111.380
2007	118.887
2008	138.230
2009	108.973
2010	141.030
2011	156.478
2012	174.260
2013	172.335
2014	161.030
2015	132.697
2016	128.710
2017	144.626
2018	176.783
2019	174.454
2020	150.031
2021	166.871
2022	192.075
2023	185.850
2024	189.566
2025	192.287
2026	195.528
2027	199.473
2028	204.011
2029	209.821