Year	%
1990	82.13
1992	56.95
1996	37.64
1997	29.04
1999	32.68
2000	33.58
2001	31.62
2002	28.62
2003	25.13
2004	28.26
2005	15.2
2006	12.94
2007	13.3
2008	8.91
2009	9.22
2010	7.78
2011	9.37
2012	9.43
2013	9.3
2015	8.51
2016	7.84
2017	7.8
2018	7.93
2019	8.86
2020	8.18
2021	8.8