*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan13000013
Feb300317
Mar00011011
Apr00633611353
May00137472207816
Jun006629156413
Jul004226322521306
Aug004718327257
Sep00201132135
Oct0031200123
Nov00050050
Dec530011064
Total69070122225563548