*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002586588
Feb1351732220431
Mar013831200450
Apr022834900577
May111452187001650
Jun152059362002436
Jul9766528001303
Aug79252100620
Sep28757500664
Oct07035100421
Nov05026600316
Dec0121150641768
Total45498937394144710224