*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00528491
Feb005512581
Mar11319200206
Apr17041800489
May131061868001942
Jun6560321188007285
Jul561016521001593
Aug1623800245
Sep1512200128
Oct00780078
Nov00180018
Dec00220401423
Total13882033725351012579