*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001612141230
Feb014637494965
Mar1232817002841
Apr5815651005737
May99150879790016165
Jun3113431313760036000
Jul258800885660016832
Aug78554272004405
Sep5113213003229
Oct001586001586
Nov0044100441
Dec00286013921678
Total757575792965023310091109