Year	Index (Units)
1988	41.936
1989	44.288
1990	46.038
1991	48.836
1992	50.895
1993	54.005
1994	56.165
1995	58.468
1996	57.493
1997	58.952
1998	61.738
1999	62.003
2000	62.644
2001	67.432
2002	67.991
2003	68.857
2004	68.401
2005	67.968
2006	70.062
2007	70.087
2008	87.074
2009	85.936
2010	84.283
2011	83.586
2012	80.384
2013	81.053
2014	83.578
2015	84.031
2016	84.736
2017	86.854
2018	85.869
2019	85.091
2020	87.447
2021	89.663
2022	104.195
2023	101.997
2024	106.869
2025	109.541
2026	111.732
2027	113.854
2028	115.904
2029	117.990