*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00004040
Feb011101628
Mar00290029
Apr11121263001286
May649682885003602
Jun7271291905002761
Jul12801373271004688
Aug198211232001451
Sep71248900562
Oct3060400607
Nov1023700238
Dec0024084108
Total294037011950014015400