*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001465466
Feb021630281446
Mar0458900593
Apr2456800574
May23552600554
Jun362436700427
Jul46624600298
Aug30424600280
Sep84137700462
Oct1027500276
Nov4040200406
Dec001080370478
Total226503867111165260