*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00221713736
Feb002777284568
Mar0256600568
Apr0437300377
May227652900807
Jun0615645001260
Jul527155900835
Aug5755900571
Sep0474800752
Oct0291400916
Nov0078300783
Dec002205717942
Total12118161753317149115