*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0006638644
Feb011761195373
Mar2733900348
Apr16682283002367
May341393812003985
Jun603434276004679
Jul931202277002490
Aug23181543001584
Sep2111346001359
Oct0035700357
Nov0023900239
Dec001801695876
Total230707168288152819301