Year	Index (Units)
1988	0.002
1989	0.003
1990	0.005
1991	0.204
1992	0.366
1993	0.599
1994	1.330
1995	1.768
1996	7.263
1997	47.150
1998	47.920
1999	51.260
2000	57.030
2001	59.780
2002	62.060
2003	65.560
2004	68.160
2005	73.200
2006	77.660
2007	86.640
2008	92.870
2009	94.390
2010	98.590
2011	100.600
2012	103.380
2013	102.500
2014	100.500
2015	99.600
2016	99.100
2017	100.880
2018	103.210
2019	106.410
2020	106.430
2021	113.440
2022	129.690
2023	136.160
2024	140.110
2025	143.266
2026	146.275
2027	149.200
2028	152.184
2029	155.228