*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0009103112
Feb0085225112
Mar0411600120
Apr43516300202
May141305272001591
Jun53126395980013290
Jul191818236002073
Aug2614500153
Sep02950097
Oct00670067
Nov00590059
Dec00410484525
Total921580918771161218401