Year	%
1991	10.72414
1993	5.009276
1996	3.215056
1997	3.186646
1998	3.228323
1999	2.90109
2000	3.114988
2001	0.3873212
2002	0.3395125
2003	0.3283641
2004	0.2912433
2005	0.3540153
2006	0.3706949
2007	0.3746128
2008	0.6786851
2009	0.3988108
2010	0.3509265
2011	0.3705483
2012	0.3378809
2013	0.3448492
2014	0.3755695
2015	0.3326278
2016	0.3490821
2017	0.371476
2018	0.3831924
2019	0.3720436
2020	0.3870718
2021	0.3649176