*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004374378
Feb001024151257
Mar03724500282
Apr744747100925
May1245031400776
Jun4252340100966
Jul456625600367
Aug14932000343
Sep4335300360
Oct0532000325
Nov0231800320
Dec00970524621
Total12415423197810495920