*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004675679
Feb002031227431
Mar11232100334
Apr251631800359
May703337600479
Jun1657051900754
Jul1043466100799
Aug4859400606
Sep1046000461
Oct0030100301
Nov0028500285
Dec002043765972
Total3701734242816676460