*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0000108108
Feb001702239
Mar01480049
Apr1123400236
May41650800528
Jun256450700596
Jul331134000384
Aug14845400476
Sep1048000481
Oct0051600516
Nov0017100171
Dec00460197243
Total78101332103273827