*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004325329
Feb00914125220
Mar03420400238
Apr531937500699
May835431100673
Jun3843640200876
Jul384623700321
Aug10925500274
Sep2327600281
Oct0525400259
Nov0221600218
Dec00710474545
Total1011208269289244933