*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00011718
Feb00100212
Mar01220800220
Apr12443000455
May42415258002677
Jun115607293005911
Jul1710841131002232
Aug111639800425
Sep0241700419
Oct00780078
Nov00150015
Dec001006070
Total449160324817912532