Year	Percent
1992	54.06828
1993	53.17486
1994	49.87237
1995	54.40332
1996	54.41927
1997	54.515
1998	54.64263
1999	55.77537
2000	54.53095
2001	46.20294
2002	46.02744
2003	40.53925
2004	41.54914
2005	45.26165
2006	44.52297
2007	43.01053
2008	42.63422
2009	42.90387
2010	44.23295
2011	44.76976
2012	45.34895
2013	46.13323
2014	47.1253
2015	47.97925
2016	47.15526
2017	46.85909
2018	47.05413
2019	47.50878
2020	46.99457
2021	46.92222