*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000077
Feb004037
Mar0125700258
Apr132128002132
May4103303003317
Jun2363829003867
Jul4452718002767
Aug221938001942
Sep011900001901
Oct0011000110
Nov005005
Dec00201012
Total13981619402016325