Year	Index (Units)
1980	22.305
1981	25.559
1982	28.188
1983	29.675
1984	31.054
1985	32.563
1986	32.627
1987	33.791
1988	35.386
1989	37.627
1990	38.769
1991	41.212
1992	43.683
1993	44.200
1994	44.509
1995	45.772
1996	46.865
1997	50.478
1998	49.838
1999	50.615
2000	51.056
2001	53.201
2002	53.371
2003	54.016
2004	54.471
2005	57.016
2006	61.265
2007	64.236
2008	68.387
2009	72.249
2010	75.991
2011	81.753
2012	87.550
2013	89.457
2014	90.911
2015	91.142
2016	90.884
2017	94.098
2018	98.961
2019	100.517
2020	101.033
2021	102.533
2022	107.658
2023	113.083
2024	117.446
2025	120.771
2026	123.722
2027	126.724
2028	129.799
2029	132.949