Year	%
1989	88.43
1994	77.19
1998	22.15
1999	18.52
2000	18.11
2001	17.89
2002	18.31
2003	19.06
2004	15.8
2005	22.7
2006	21.64
2007	9.25
2008	7.71
2009	10.71
2010	9.94
2011	9.63
2012	12.84
2013	12.09
2015	12.32
2016	11.03
2019	9.34
2020	11.48
2021	11.44