*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0000144144
Feb0052048100
Mar01516700182
Apr015333400487
May244450200570
Jun127670500793
Jul62529300324
Aug13880092
Sep00710071
Oct00730073
Nov00750075
Dec00551274330
Total43316241514663241