*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000000
Feb000011
Mar002002
Apr1325000254
May204077509004606
Jun1216086667006874
Jul935872658003338
Aug4492386002439
Sep1111072001084
Oct00160016
Nov000000
Dec001001
Total2901076375610118615