*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00003030
Feb102602148
Mar0155900560
Apr3754100551
May24101077001111
Jun73341702001809
Jul17581000832
Aug3236400369
Sep3018800191
Oct0021500215
Nov0010000100
Dec0024091115
Total12459560601425931