Year	Percent
2001	10.41075
2002	10.89067
2003	10.62718
2004	10.16307
2005	9.00766
2006	9.06881
2007	9.76478
2008	9.47767
2009	10.49162
2010	11.63189
2011	12.33191
2012	12.86573
2013	13.40696
2014	13.27958
2015	14.13487
2016	13.0514
2017	12.74752
2018	11.81812
2019	11.92966
2020	14.14705
2021	15.26618
2022	13.87475