*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00522532
Feb102601239
Mar6014000146
Apr0631000316
May310242100526
Jun166734900432
Jul8510900122
Aug51880094
Sep0010400104
Oct0010300103
Nov00610061
Dec00110130141
Total39181172721672116