Year	%
1990	14.2857142857143
1991	11.1111111111111
1992	10
1993	9.09090909090909
1994	15.3846153846154
1995	13.3333333333333
1996	11.1111111111111
1997	13.6363636363636
1998	12
1999	10
2000	11.4285714285714
2001	12.1951219512195
2002	10.6382978723404
2003	10.9090909090909
2004	9.52380952380952
2005	9.58904109589041
2006	9.52380952380952
2007	9.18367346938776
2008	9.64912280701754
2009	9.09090909090909
2010	9.21052631578947
2011	8.57142857142857
2012	8.45771144278607
2013	8.69565217391304
2014	8.3969465648855
2015	8.08080808080808
2016	8.08383233532934
2017	8.04289544235925
2018	7.97101449275362
2019	7.87746170678337
2020	7.76892430278884
2021	7.83242258652095
2022	7.70519262981575