*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004734738
Feb002780281559
Mar1892800937
Apr1451539001585
May24591571001654
Jun1341121419001665
Jul165171036001218
Aug681274800828
Sep15466700686
Oct3050200505
Nov1038500386
Dec0016919511121
Total41225792425196611882