*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00003030
Feb102602148
Mar0155800559
Apr3754100551
May24101076001110
Jun72341699001805
Jul17580700829
Aug3236400369
Sep3018700190
Oct0021300213
Nov00990099
Dec0024091115
Total12359559401425918