*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00013187200
Feb1183158144
Mar01940095
Apr1114200144
May42825900291
Jun1219278600990
Jul103025000290
Aug2917600187
Sep3514100149
Oct00830083
Nov0010400104
Dec00694666739
Total332672187189113416