*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0007325332
Feb001162133251
Mar0022700227
Apr0013000130
May633147100808
Jun1414601420002894
Jul158661136002017
Aug6879500809
Sep2362200627
Oct0039900399
Nov0022200222
Dec00593384446
Total4326685597128429162