Year	Percent
1974	1.33782
1975	1.33555
1976	1.10918
1977	1.01732
1978	1.08715
1979	0.90207
1980	0.63485
1981	0.6938
1982	0.84379
1983	0.98475
1984	1.06587
1985	1.21254
1986	1.92772
1987	1.93073
1988	2.21615
1989	0.96156
1990	0.96614
1991	1.02205
1992	0.96521
1993	1.07733
1994	1.19871
1995	1.16153
1996	1.12211
1997	1.22734
1998	1.41028
1999	1.23498
2000	1.02441
2001	1.13457
2002	1.09357
2003	1.2222
2004	1.12745
2005	0.94659
2006	0.70614
2007	0.68966
2008	0.63585
2009	0.90896
2010	0.73301
2011	0.57503
2012	0.6554
2013	0.68466
2014	0.86274
2015	1.10249
2016	1.20363
2017	1.08645
2018	1.01764
2019	0.98606
2020	1.2175
2021	1.25629
2022	1.09616