Year	%
1990	86.84
1992	58.9
1996	40.56
1997	31.24
1999	34.14
2000	37.28
2001	34.99
2002	30.51
2003	25.86
2004	29.02
2005	16.28
2006	14.44
2007	14.01
2008	9.76
2009	10.13
2010	9.44
2011	9.81
2012	9.88
2013	9.79
2015	9
2016	9.87
2017	10.01
2018	10.1
2019	11.65
2020	10.8
2021	11.25