*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00025154179
Feb1080460145
Mar329901105
Apr25710078
May32844173003020
Jun207780470008270
Jul163202430003648
Aug22520300230
Sep0720600213
Oct00870087
Nov00730073
Dec00523712767
Total471386519443292716815