*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan1039000112
Feb2520850112
Mar0001164120
Apr00416335202
May001427213051591
Jun00535981263913290
Jul001923618182073
Aug0021456153
Sep00095297
Oct00067067
Nov00059059
Dec48400410525
Total612119218771580918401