*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00222149173
Feb0055448107
Mar02960098
Apr23222200256
May921173000950
Jun208133248004081
Jul2117536900565
Aug7210200111
Sep13880092
Oct1110800110
Nov02720074
Dec00512665718
Total6112415143288627335