*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004520582103
Feb0482337181548
Mar3701379001452
Apr101861144001340
May242670244002938
Jun513610304003965
Jul31911973002095
Aug981117001134
Sep3363800644
Oct0058100581
Nov0154500546
Dec00382217092093
Total1316643913050448520439