*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004207211
Feb0051351105
Mar0010000100
Apr0425800262
May42312250002566
Jun82871271003150
Jul13571719001303
Aug27760800642
Sep0139000391
Oct0023800238
Nov0012000120
Dec00651598664
Total525766307088569752