*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00005858
Feb035403087
Mar03410600140
Apr031357900892
May299529800422
Jun1573244100630
Jul1111727900407
Aug28627100305
Sep8214900159
Oct1011600117
Nov00950095
Dec002914272
Total334502241711303384