Year,Annual mean,5 year mean
2004,2.49,0.56
2005,0.63,1.57
2006,2.56,0.54
2007,0.59,1.56
2008,2.44,0.56
2009,0.57,0.55
2010,2.64,1.54
2011,0.52,
2012,2.52,