*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001212
Feb003047
Mar00210021
Apr3171004001024
May102937584003531
Jun443297589003930
Jul32244986001262
Aug7369300703
Sep0128100282
Oct00450045
Nov2090011
Dec00501722
Total986499422003310850