*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00010639649
Feb211921246442
Mar31153600550
Apr6856200576
May79041063001974
Jun1544132596007024
Jul1325202158004691
Aug41376600783
Sep3439900406
Oct4030200306
Nov0027700277
Dec001130615728
Total577874896411150018406