import numpy, scipy.stats
data = numpy.genfromtxt( 'f2013.all.csv', delimiter=',' )
data[data<-90.0] = numpy.nan
years = data[:,0]
data = data[:,1:]
#print data.shape
#print data
force = scipy.stats.nanmean(data,axis=1)
#print force
for i in range(len(years)):
  if not numpy.isnan(force[i]):
    print int(years[i]),force[i]