Year	%
1990	37.1
1993	45.77
1994	43.88
1997	40.5
1998	20.56
2000	11.18
2001	11.01
2003	8.57
2004	8.12
2005	9.63
2006	8.19
2007	8.54
2008	8.28
2009	9.67
2010	12.01
2011	11.18
2012	9.7
2014	9.57
2015	6.9
2017	15.22
2018	19.46
2019	23.19
2020	11.75
2021	11.03