Year	%
1989	92.19012
1990	83.00277
1991	75.80614
1992	70.36043
1993	57.75788
1994	46.95707
1995	42.69305
1996	45.72871
1997	45.74
1998	59.09689
1999	24.17611
2000	57.47601
2001	45.77842
2002	45.0433
2003	44.05417
2004	37.64192
2005	27.74958
2006	25.54869
2007	26.47801
2008	26.3877
2009	26.3968
2010	26.67794
2011	27.52846
2012	28.02613
2013	30.72899
2014	27.94946
2015	27.61372
2016	27.4411
2017	28.29957
2018	28.15164
2019	27.91542
2020	28.03717
2021	27.32438