*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00011819
Feb00110213
Mar02824800276
Apr211243300547
May72917268003192
Jun165723299006038
Jul1810841154002256
Aug111942100451
Sep0243200434
Oct00800080
Nov00170017
Dec001006070
Total549885337318013393