*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004301305
Feb20137077216
Mar681451001465
Apr3212326002350
May101602114002284
Jun491851927002161
Jul631438900466
Aug17224700266
Sep1048900490
Oct0063200632
Nov0035700357
Dec00790446525
Total15139010148482411517