*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001620492065
Feb0185239081764
Mar4133371003388
Apr8363816003860
May856541587007213
Jun1249077696009897
Jul328072555003394
Aug452070002079
Sep192228002238
Oct011874001875
Nov0087800878
Dec00435219792416
Total258164901936221493641067