*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00004040
Feb011101628
Mar00290029
Apr11121262001285
May650682884003602
Jun7281301902002760
Jul12801373272004689
Aug198221230001450
Sep71248900562
Oct3060400607
Nov1023700238
Dec0024084108
Total294237211944014015398