Year	%
1991	31.33644
1993	11.99313
1996	12.43509
1997	12.68009
1998	12.73222
1999	12.60721
2000	6.734685
2001	6.601477
2002	5.785718
2003	5.924733
2004	6.246978
2005	5.971115
2006	5.330179
2007	5.400301
2008	5.520917
2009	5.472489
2010	0.1926712
2011	0.0482096
2012	0.0461435
2013	0.0471726
2014	0.0518258
2015	0.0457845
2016	0.0483132
2017	0.0467364
2018	0.0481388
2019	0.046141
2020	0.0504308
2021	0.0473551