*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00003737
Feb024902273
Mar012540430012583
Apr026820200470
May217114600238
Jun743025300357
Jul861215200250
Aug21418300208
Sep8210500115
Oct00710071
Nov00560056
Dec002713462
Total21012929128719314520