*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00010519529
Feb001851256442
Mar0950200511
Apr31068700700
May76152366006525
Jun15192638370020115
Jul16711544960011627
Aug10202592002622
Sep131677001681
Oct0073200732
Nov0028500285
Dec00890765854
Total52325721244811154046623