*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00012129141
Feb012502147
Mar00370037
Apr1511400120
May410323800345
Jun512344200570
Jul44823200284
Aug61328200301
Sep2722900238
Oct12730076
Nov00510051
Dec00511643695
Total233021774137932905