*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan01056672
Feb102502349
Mar12390042
Apr34390046
May6883137001026
Jun94299413004721
Jul52440400002845
Aug2710300112
Sep13280032
Oct10250026
Nov00230023
Dec00210305326
Total297639125353949320