*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00003434
Feb102802352
Mar0157400575
Apr2560200609
May23101091001124
Jun70341923002027
Jul16592400945
Aug3246200467
Sep3026100264
Oct0024800248
Nov0013300133
Dec00400111151
Total11857628601686629