Year	Percent
1984	2.04302
1985	1.9046
1986	1.81193
1987	1.82756
1989	2.01251
1990	2.20853
1991	2.83373
1992	2.66301
1993	2.46129
1994	2.67508
1995	2.83415
1996	2.64691
1997	1.56182
1998	1.37856
1999	1.26759
2000	1.34465
2001	1.19863
2002	1.51332
2003	1.34722
2004	1.16175
2005	1.06444
2006	1.17042
2007	1.09339
2008	1.04313
2009	0.90964
2010	1.09749
2011	1.0923
2012	1.07272
2013	0.93502
2014	0.85104
2015	0.8267
2016	0.88675
2017	0.78263
2018	0.68676
2019	0.54523
2020	0.8273
2021	0.47625
2022	0.57221