*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002718991926
Feb1489337551656
Mar71563103003266
Apr225163173003711
May835689551006323
Jun1117812679008602
Jul304312397002858
Aug351523001531
Sep081567001575
Oct011364001365
Nov0063500635
Dec00329215571888
Total257146221621432421135336