Year	years
2003	1.9235294117647057
2004	1.9058823529411764
2005	1.9058823529411764
2006	1.8666666666666663
2007	1.8666666666666663
2008	1.8473684210526313
2009	1.8368421052631574
2010	1.8473684210526313
2011	1.8349999999999995
2012	1.8599999999999994
2013	1.9149999999999996
2014	1.9849999999999994
2015	1.9249999999999994
2016	1.9249999999999994
2017	1.9249999999999994
2018	1.9249999999999994
2019	1.9249999999999994