*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000033
Feb001001
Mar0190010
Apr1124100243
May21293344001639
Jun21295991003071
Jul351094997002126
Aug16548500506
Sep131121001125
Oct0136000361
Nov10150016
Dec00111517
Total77535736651189118