*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004207211
Feb0050351104
Mar0010000100
Apr0425700261
May42311249002564
Jun82871271003150
Jul13571719001303
Aug27760800642
Sep0139000391
Oct0023800238
Nov0012000120
Dec00651598664
Total525765306788569748