*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00002828
Feb002046
Mar04160020
Apr019853500733
May22434465002901
Jun233399155003577
Jul2615441523003093
Aug241157900614
Sep151795001801
Oct1068000681
Nov00240024
Dec00150112127
Total7775955789014413605