Year	Percent
2002	42.68257
2003	44.17366
2004	45.66475
2005	47.15583
2006	48.64692
2007	50.138
2008	51.62909
2009	53.78839
2010	55.98521
2011	58.21954
2012	60.49138
2013	62.80074
2014	65.14761
2015	67.53199
2016	69.95389
2017	72.4133
2018	74.91022
2019	76.58888
2020	78.26753
2021	79.94619
2022	81.62484