Year	%
1989	24.78
1990	23.15
1993	16.74
1995	14.01
1996	10.76
1997	20.57
1998	7.93
1999	9.86
2000	8.02
2001	6.13
2002	6.28
2003	5.74
2004	5.81
2005	5.78
2006	5.82
2007	5.57
2008	6.84
2009	4.96
2010	5.18
2011	5.3
2012	5.43
2013	5.37
2016	6.31
2017	5.86
2018	6.25
2019	6.71
2020	6.29
2021	6.02