*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0000227227
Feb0060187148
Mar0111100112
Apr01043200442
May132075500788
Jun152956300607
Jul213742400482
Aug23741800448
Sep4065700661
Oct0019500195
Nov00920092
Dec10592354416
Total77104376636684618