*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0005139144
Feb003802462
Mar0213300135
Apr12828000309
May114446400519
Jun3810736500510
Jul471825300318
Aug221017700209
Sep3417100178
Oct0010100101
Nov00730174
Dec00491736786
Total122213210469003345