*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00025964989
Feb033205310638
Mar03257200604
Apr27449700573
May221264561001847
Jun9121001524003715
Jul574701775002302
Aug71170800726
Sep1761500623
Oct0041100411
Nov0038400384
Dec00180211571339
Total1803961754732243114151