*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00011718
Feb00130316
Mar01225200264
Apr12454000565
May43003260003267
Jun146324295006633
Jul1913351231002585
Aug171757400608
Sep0265000652
Oct0011000110
Nov00170017
Dec001106374
Total5510717395318314809