*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0007539546
Feb002132213428
Mar0242900431
Apr1433500340
May2853700547
Jun61132000337
Jul6122600233
Aug5233000337
Sep0256900571
Oct0180100802
Nov1044800449
Dec001720627799
Total21314380913795820