*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00528491
Feb005512581
Mar11419200207
Apr17041800489
May131061868001942
Jun6560331188007286
Jul561016521001593
Aug1623800245
Sep1512300129
Oct00780078
Nov00180018
Dec00220401423
Total13882053726351012582