*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00044347
Feb00121821
Mar00310031
Apr31313500151
May173521397001766
Jun3416087554009196
Jul317111386002128
Aug72745310488
Sep1221800221
Oct00300030
Nov00220022
Dec00191261281
Total93271311257731214382