*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001212
Feb002046
Mar00200020
Apr3171007001027
May102927590003527
Jun443294592003930
Jul32245984001261
Aug7368700697
Sep0128100282
Oct00450045
Nov2090011
Dec00501722
Total986487422203310840