*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00003333
Feb002068
Mar00170017
Apr01660200618
May02832471003303
Jun203759135003914
Jul3218821613003527
Aug291174000780
Sep142396002401
Oct101022001023
Nov00330033
Dec00190125144
Total8385047050016415801