*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001033743384
Feb371032511622209
Mar71642772002907
Apr237804103004420
May204995453005756
Jun2353757180007790
Jul1261664687004979
Aug27203395003442
Sep6103361003377
Oct212061002064
Nov101308001309
Dec108501022623123
Total9138223620225679844760