Year	Percent
2000	83.19634
2001	81.44785
2002	79.70692
2003	77.97354
2004	76.24771
2005	74.52943
2006	72.81871
2007	71.11554
2008	69.41993
2009	67.73187
2010	66.05136
2011	64.3784
2012	62.71299
2013	61.05514
2014	59.40484
2015	57.7621
2016	56.12691
2017	54.49927
2018	52.87918
2019	51.26665
2020	49.66166
2021	48.06424
2022	48.06424