Progress report output is not human-friendly

[dboreham]

For me it looks like this:

at 14m12s, row rate 79934.24/sec (period), row rate 64460.02/sec (overall), 5.492000E+07 total rows
at 14m13s, row rate 59992.56/sec (period), row rate 64454.78/sec (overall), 5.498000E+07 total rows
at 14m14s, row rate 69999.40/sec (period), row rate 64461.28/sec (overall), 5.505000E+07 total rows
at 14m15s, row rate 85046.06/sec (period), row rate 64485.34/sec (overall), 5.513500E+07 total rows
at 14m16s, row rate 79961.14/sec (period), row rate 64503.43/sec (overall), 5.521500E+07 total rows
at 14m17s, row rate 85005.56/sec (period), row rate 64527.35/sec (overall), 5.530000E+07 total rows
at 14m18s, row rate 80014.88/sec (period), row rate 64545.40/sec (overall), 5.538000E+07 total rows
at 14m19s, row rate 70003.77/sec (period), row rate 64551.75/sec (overall), 5.545000E+07 total rows
at 14m20s, row rate 80015.25/sec (period), row rate 64569.73/sec (overall), 5.553000E+07 total rows
at 14m21s, row rate 79974.30/sec (period), row rate 64587.63/sec (overall), 5.561000E+07 total rows
at 14m22s, row rate 79984.80/sec (period), row rate 64605.49/sec (overall), 5.569000E+07 total rows
at 14m23s, row rate 90008.19/sec (period), row rate 64634.92/sec (overall), 5.578000E+07 total rows

I don't think "5.492000E+07" is useful to any human.