*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00011718
Feb00130316
Mar01225500267
Apr12454200567
May43003268003275
Jun146325323006662
Jul1913351232002586
Aug171757500609
Sep0265000652
Oct0011100111
Nov00170017
Dec001106374
Total5510718399718314854