*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004325329
Feb00914125220
Mar03420400238
Apr531937400698
May834731100666
Jun3842340200863
Jul384523700320
Aug10925500274
Sep2327600281
Oct0525300258
Nov0221500217
Dec00710474545
Total1011187268989244909