Year	%
1990	36.43
1993	33.24
1994	33.69
1997	27.82
1998	19.9
2000	16.48
2001	16.2
2003	15.07
2004	16.79
2005	18.01
2006	17.77
2007	17.62
2008	17.46
2009	17.41
2010	17.93
2011	17.83
2012	18.31
2014	16.27
2015	13.29
2017	19.77
2018	25.36
2019	38.25
2020	18.15
2021	13.22