Year	Index (Units)
1980	7.124
1981	7.734
1982	8.115
1983	8.293
1984	8.439
1985	8.860
1986	9.666
1987	10.824
1988	11.349
1989	12.062
1990	15.248
1991	17.402
1992	19.639
1993	21.859
1994	23.740
1995	27.374
1996	28.396
1997	31.201
1998	30.205
1999	30.729
2000	31.087
2001	31.905
2002	32.458
2003	36.120
2004	39.722
2005	42.429
2006	46.478
2007	51.463
2008	57.414
2009	64.541
2010	66.668
2011	75.087
2012	80.296
2013	85.713
2014	89.299
2015	95.372
2016	95.377
2017	96.839
2018	99.389
2019	97.962
2020	97.512
2021	102.132
2022	103.726
2023	106.439
2024	108.994
2025	112.264
2026	114.551
2027	116.842
2028	119.179
2029	121.562