*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001212
Feb003047
Mar00210021
Apr3171006001026
May102940590003540
Jun443300592003936
Jul32245989001266
Aug7369400704
Sep0128200283
Oct00450045
Nov2090011
Dec00501722
Total986506423603310873