Year	%
1988	25.12
1989	27.2
1990	27.39
1992	27.57
1995	86.48
1996	22.58
1997	22.63
1998	22.63
1999	24.32
2000	24.21
2001	23.67
2002	23.68
2003	23.62
2005	10.26
2006	10.31
2008	10.67
2009	9.68
2010	10.81
2011	10.94
2013	11.09
2014	11.54
2015	11.09
2016	11.34
2020	12.33
2021	12.33