Year	Percent
1998	17.94345
1999	16.11288
2000	17.98484
2001	17.98026
2002	15.4433
2003	12.0059
2004	11.87822
2005	11.54364
2006	13.77816
2007	12.38524
2008	9.51732
2009	10.00252
2010	14.81371
2011	14.42546
2012	12.22163
2013	14.8016
2014	14.99254
2015	15.66438
2016	19.4105
2017	17.97886
2018	16.32
2019	17.05141
2020	13.61711
2021	14.23424
2022	18.67476