Year	%
1989	25.88
1990	24.2
1993	16.89
1995	14.32
1996	10.6
1997	21.05
1998	8.24
1999	9.72
2000	8.32
2001	6.15
2002	6.19
2003	5.79
2004	5.97
2005	6.02
2006	6.08
2007	5.79
2008	6.81
2009	5.12
2010	5.07
2011	5.18
2012	5.21
2013	5.23
2016	6.21
2017	5.75
2018	6.11
2019	6.19
2020	6.32
2021	6.05