*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0005649654
Feb0115361367915
Mar12552248002504
Apr38623740004605
May198893921009833
Jun981418412260015508
Jul7311103674004857
Aug4998300996
Sep1558400590
Oct0041900419
Nov0012200122
Dec00770640717
Total19925329145306165641720