*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001715601577
Feb0261325651182
Mar0211867001888
Apr0251484001509
May186158800667
Jun782044400542
Jul74740200483
Aug17227700296
Sep1018400185
Oct0021400214
Nov0067300673
Dec00347014321779
Total188138709319355710995