Year	%
1989	41.22
1991	41.99
1993	44.17
1995	21.77
1999	42.61
2000	17.12
2001	14.71
2003	13.75
2004	11.32
2005	10.55
2006	10.84
2007	10.52
2008	10.78
2009	11.01
2010	10.81
2011	11.25
2013	12.03
2014	8.42
2015	7.96
2021	8.48