Year	Percent
1994	19.01922
1995	20.08039
1996	21.40553
1997	19.95677
1998	19.19095
1999	17.00022
2000	17.76551
2001	16.81333
2002	16.43011
2003	15.6259
2004	15.96882
2005	16.1379
2006	15.8998
2007	16.46075
2008	16.26226
2009	16.0677
2010	16.98182
2011	18.88431
2012	17.61219
2013	16.49173
2014	16.70931
2015	16.11012
2016	14.91502
2017	14.99686
2018	15.32186
2019	15.52944
2020	15.73629
2021	15.52887
2022	16.78433