Year	%
1993	29.28
1997	15.97
2001	18.67
2002	18.09
2003	16.27
2004	19.85
2005	16.4
2006	19.75
2007	18.24
2008	18.22
2009	16.55
2010	16.54
2011	16.52
2012	17.31
2013	17.24
2015	17
2016	18.24
2018	17.66
2020	17.67
2021	19.72