*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan28101030
Feb80014022
Mar00016512177
Apr004484136624
May001785038144681
Jun005220352436526452
Jul003064633424018
Aug001033416360
Sep0002824286
Oct0001360136
Nov00015015
Dec1710090180
Total207111349713168936981