Year	Number
2004	74.038459777832
2005	85.5769195556641
2006	72.1153869628906
2007	70.6730804443359
2008	70.1923065185547
2009	69.6682434082031
2010	70.6161117553711
2011	70.8920211791992
2012	73.2394332885742
2013	72.3004684448242