Year	Index (Units)
1980	0.023
1981	0.023
1982	0.023
1983	0.024
1984	0.025
1985	0.025
1986	0.026
1987	0.027
1988	0.027
1989	0.029
1990	0.036
1991	0.156
1992	0.283
1993	0.489
1994	0.959
1995	1.555
1996	3.468
1997	40.272
1998	47.794
1999	49.023
2000	54.082
2001	58.061
2002	61.436
2003	62.878
2004	66.745
2005	70.775
2006	76.023
2007	81.780
2008	91.553
2009	93.813
2010	96.664
2011	99.938
2012	102.327
2013	102.721
2014	101.077
2015	99.998
2016	98.676
2017	99.848
2018	102.476
2019	104.994
2020	106.274
2021	109.295
2022	123.524
2023	134.146
2024	138.642
2025	142.444
2026	145.534
2027	148.512
2028	151.482
2029	154.511