Year	Percent
2000	30.99105
2001	30.72526
2002	30.45947
2003	30.19368
2004	29.92789
2005	29.6621
2006	29.39631
2007	29.13052
2008	28.86473
2009	28.59894
2010	28.33316
2011	28.06737
2012	27.80158
2013	27.80158
2014	27.80158
2015	27.80158
2016	27.80158