*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0008928936
Feb0112624319596
Mar058972001030
Apr01311575001706
May23730345004077
Jun217975401008397
Jul2815422560004130
Aug112693500972
Sep1766700675
Oct0149200493
Nov0029900299
Dec00199512021406
Total6313481870717244924717