*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00004040
Feb011101628
Mar00270027
Apr3131137001153
May1402201298001658
Jun112621126001300
Jul4922611735002488
Aug7541937001053
Sep31442700462
Oct2060300605
Nov1023700238
Dec0024084108
Total856602756201409160