*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0000138138
Feb002903059
Mar03530056
Apr314146500609
May164795497005308
Jun92941910210010532
Jul477352731003513
Aug4111213001228
Sep2892600936
Oct0015200152
Nov00150015
Dec00290258287
Total164151127131042622833