Year	Percent
1995	16.41538
1996	17.75207
1997	16.80956
1998	16.53548
1999	18.41797
2000	17.07003
2001	14.65274
2002	9.76715
2003	8.08546
2004	8.53045
2005	6.73939
2006	6.81756
2007	6.11904
2008	7.44474
2009	7.20149
2010	6.60246
2011	7.44515
2012	6.43466
2013	7.41422
2014	7.06588
2015	6.71385
2016	6.81115
2017	6.01415
2018	6.34278
2019	5.95442
2020	6.34335
2021	6.29319
2022	6.45989