Year	Number
2003	27.5503
2004	28.8961
2005	28.66842
2006	27.87439
2007	27.27232
2008	26.74772
2009	23.99712
2010	25.13772
2011	24.7263
2012	25.7089
2013	23.48372
2014	23.23018
2015	22.9846
2016	23.02209