wb4: Started Wed Feb 6 15:31:12 AEDST 2013
MMYYYY = [112012]
112012 - billperiod = [Nov_2012]
gawk: wb4.awk:34: warning: escape sequence `\.' treated as plain `.'
2110547 blocks

real 21:39:06.11
user 14:46:21.06
sys   6:26:40.76