*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00003131
Feb0180615
Mar00240024
Apr8151028001051
May1542221013001389
Jun896774800904
Jul4362571138001831
Aug523352500610
Sep20430100325
Oct1049200493
Nov0016500165
Dec002006888
Total760599546201056926