*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00018586
Feb004304588
Mar01971326001523
Apr58863802004693
May28121559660013149
Jun793610819950038182
Jul4038343639007513
Aug12271454001493
Sep0121290001302
Oct1066000661
Nov00580058
Dec10200224245
Total1665321915253135468993