*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001518151830
Feb0272437211450
Mar261264001272
Apr5221145001172
May152429251002695
Jun463499296003841
Jul26941915002035
Aug891098001115
Sep2361100616
Oct0053300533
Nov0150100502
Dec00383217102095
Total1046065872120424619156