*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0000100100
Feb0052051103
Mar0651422001487
Apr42504709004963
May29139229230014874
Jun773924019600041277
Jul4945153921008485
Aug12282090002130
Sep0121882001894
Oct1087300874
Nov00940094
Dec10340244279
Total1735803217960039576560