Year	Index (Units)
1988	0.003
1989	0.081
1990	6.274
1991	15.010
1992	23.525
1993	32.813
1994	37.861
1995	41.734
1996	46.675
1997	49.692
1998	52.676
1999	54.639
2000	56.680
2001	56.608
2002	57.466
2003	58.893
2004	60.943
2005	61.854
2006	62.557
2007	65.014
2008	69.338
2009	69.508
2010	70.949
2011	74.316
2012	76.281
2013	78.462
2014	80.996
2015	84.555
2016	87.291
2017	88.482
2018	90.422
2019	92.140
2020	93.958
2021	99.997
2022	108.457
2023	111.968
2024	114.656
2025	116.970
2026	119.330
2027	121.737
2028	124.193
2029	126.677