# only average those with rates > 0
{
if (NR==1) {sum=0; first=0; one = 0; count = 0; mark=0}
if (NF==2) 
{
if (first==1)
  {
  if ($1==one) 
    # if ($1==one && $2>0) 
    # Do we only want to count those with non-zero pprs?
    { sum = sum+$2; count = count+1 }
  if ($1 != one) 
    { 
    if (count > 0) {print one, sum/count}
    one = $1; count = 1; sum = $2
    }
  }
if (first==0)
  {
  first=1; one = $1; sum = $2; count = 1
  }
}
}
END { if (count > 0) {print one, sum/count}
}