*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00044347
Feb00121821
Mar00310031
Apr31313500151
May173531414001784
Jun3416417574009249
Jul327111386002129
Aug72746110496
Sep1221900222
Oct00310031
Nov00220022
Dec00191261281
Total94274711304731214464