*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00002424
Feb004026
Mar00760076
Apr511070001076
May2472177002208
Jun5532644002702
Jul1821753001773
Aug601154001160
Sep1065600657
Oct0020800208
Nov00570057
Dec001204860
Total10913981107410007