*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00212184198
Feb1379375161
Mar161619900231
Apr864850900643
May648378900936
Jun1203112242002673
Jul821481029001259
Aug121351000535
Sep11046200473
Oct0023200232
Nov0010910110
Dec017010495576
Total3826336232267548027