Year	number
2005	25.8
2006	26
2007	26.6
2008	26.6
2009	26.6
2010	29
2011	29
2012	29.8
2013	35.01375
2014	33.63875
2015	33.63875
2016	32.63875
2017	28.6175
2018	27.6175
2019	26.7425