Year	%
1996	28.32933
1997	32.92605
1998	28.32933
1999	28.32933
2000	53.11828
2001	29.4182
2002	32.2737
2003	32.60213
2004	32.60879
2005	31.49311
2006	28.4727
2007	26.18385
2008	27.12736
2010	26.4992
2011	31.29876
2012	32.11539
2013	31.69595
2015	26.59621
2016	25.42605
2017	20.22178
2018	20.2167
2020	19.76218
2021	18.5791