*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00013912925
Feb013354381721
Mar2221523001547
Apr3412247002291
May166406149006571
Jun79199392400020258
Jul55871724860011258
Aug29201308001357
Sep151466001472
Oct011314001315
Nov0054800548
Dec0123619581196
Total185351531185218225149459