*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0008928936
Feb0112624319596
Mar058972001030
Apr01311577001708
May23737345004084
Jun217992401008414
Jul2815562560004144
Aug112693600973
Sep1766700675
Oct0149200493
Nov0030100301
Dec00199512021406
Total6313519871217244924760