*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001620472063
Feb0295539071867
Mar4133416003433
Apr8313837003876
May856565553007203
Jun1249093676009893
Jul328112574003417
Aug352102002110
Sep192266002276
Oct011904001905
Nov0090300903
Dec00444219782424
Total257165301963021493241370