*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0000100100
Feb0052051103
Mar0651428001493
Apr42504737004991
May30139239410014894
Jun773924019980041315
Jul4945153922008486
Aug12282090002130
Sep0121882001894
Oct1087300874
Nov00940094
Dec10340244279
Total1745803318051039576653