*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00004040
Feb024902273
Mar013553440013597
Apr027020300473
May217114700239
Jun753125300359
Jul861215200250
Aug21518300209
Sep8210600116
Oct10710072
Nov00570057
Dec002713664
Total21213946129219815549