*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004317071750
Feb03571175941185
Mar041799001803
Apr15182311002344
May244173588004029
Jun2918983637005564
Jul244612358002843
Aug711505001513
Sep021161001163
Oct001015001015
Nov0049600496
Dec11288311791472
Total10028051872963348025177