Year	%
1990	38.66
1992	8.38
1996	18.76
1997	16.2
1999	23.32
2000	15.89
2001	23.3
2002	19.8
2003	19.87
2004	18.77
2005	15.3
2006	8.31
2007	13.04
2008	6.02
2009	6.08
2010	8.78
2011	7.99
2012	4.96
2013	5.03
2015	7.44
2016	7.34
2017	5.61
2018	3.88
2019	8.48
2020	5.85
2021	4.59