*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000077
Feb004037
Mar0125800259
Apr132133002137
May4103303003317
Jun2363831003869
Jul4452719002768
Aug221940001944
Sep011901001902
Oct0011000110
Nov005005
Dec00201012
Total13981620602016337