*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001033743384
Feb371031511612207
Mar71642769002904
Apr236784086004400
May199955415005709
Jun2183697123007710
Jul1261664687004979
Aug27203394003441
Sep6103359003375
Oct112061002063
Nov101305001306
Dec108501022613122
Total8898103608025679644600