def read_outflow(file_name):
    """Read outflow values.
    """
    fobj = open(file_name)
    header = fobj.next().split()
    outflow = {}
    for head in header:
        outflow[head] = []
    for line in fobj:
        line = line.split()
        for pos, head in enumerate(header):
            outflow[head].append(float(line[pos]))
    return outflow
