Year	%
1997	9.00900900900901
1998	8.10810810810811
1999	8.10810810810811
2000	8.10810810810811
2001	8.10810810810811
2002	11.7117117117117
2003	11.7117117117117
2004	11.7117117117117
2005	11.7117117117117
2006	11.7117117117117
2007	15.3153153153153
2008	15.3153153153153
2009	15.3153153153153
2010	15.3153153153153
2011	15.3153153153153
2012	15.748031496063
2013	15.748031496063
2015	9.44881889763779
2016	9.44881889763779
2017	11.0236220472441
2018	11.0236220472441
2019	13.3858267716535
2020	6.2992125984252
2021	6.2992125984252
2022	16.9014084507042
2023	16.9014084507042