Year	%
1989	29.68
1990	20.73
1991	15.24
1992	20.66
1993	7.87
1994	7.39
1995	8.63
1996	8.73
1997	8.68
1998	11.46
1999	11.44
2000	11.35
2001	10.93
2002	10.02
2003	9.98
2004	9.98
2005	8.6
2006	8.57
2007	8.65
2008	8.69
2009	8.72
2010	8.72
2011	8.74
2012	8.73
2013	8.85
2014	8.87
2015	8.9
2016	8.9
2017	8.87
2018	8.87
2019	8.86
2020	8.86
2021	8.86