Year	Percent
1993	50.85239
1994	50.85239
1995	50.85239
1996	50.81081
1997	50.8316
1998	50.79002
1999	50.79002
2000	50.72765
2001	46.8815
2002	46.50728
2003	46.47682
2004	40.2079
2005	40.35343
2006	40.31185
2007	40.12474
2008	40.27027
2009	40.13308
2010	40.43792
2011	40.12851
2012	40.08069
2013	39.37365
2014	39.297
2015	39.27873
2016	39.22629
2017	39.0807
2018	39.28869
2019	39.20549
2020	39.16389
2021	38.60233