*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00125760
Feb001301124
Mar1117200174
Apr52932500359
May26222832001080
Jun6811532834004055
Jul37324759001120
Aug81042100439
Sep2425300259
Oct00740074
Nov00330033
Dec00251395421
Total1471743574234638098