*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00125131157
Feb0076545126
Mar0213300135
Apr35629400353
May84721574002054
Jun3911093900005048
Jul377541922002713
Aug22332200347
Sep2627500283
Oct0015700157
Nov00790079
Dec00483367418
Total91242287813354311870