*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001212
Feb002046
Mar00200020
Apr3171008001028
May102927597003534
Jun443294592003930
Jul32245985001262
Aug7368700697
Sep0128100282
Oct00450045
Nov2090011
Dec00501722
Total986487423103310849