*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004910914
Feb003060365671
Mar181114001123
Apr1451856001902
May26591891001976
Jun1471131684001944
Jul180181257001455
Aug7113969001053
Sep15493000949
Oct3062800631
Nov1051400515
Dec00208111081317
Total445260113575238314450