*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00013912925
Feb013354381721
Mar2221524001548
Apr3412249002293
May166406149006571
Jun79199402410020260
Jul55871724870011259
Aug29201311001360
Sep151471001477
Oct011314001315
Nov0054800548
Dec0123619581196
Total185351541186518225149473