*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00010519529
Feb001851256442
Mar0950200511
Apr31068800701
May76152367006526
Jun15192638370020115
Jul16711544970011628
Aug10202593002623
Sep131677001681
Oct0073200732
Nov0028500285
Dec00890765854
Total52325721245211154046627