*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004298302
Feb20136076214
Mar681433001447
Apr3212311002335
May101602112002282
Jun491851925002159
Jul631438800465
Aug16224800266
Sep1048400485
Oct0062700627
Nov0035300353
Dec00790446525
Total15039010096482011460