*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan01027328356
Feb20158398261
Mar6546300474
Apr176387700957
May782571453001788
Jun1553942133002682
Jul1284155100720
Aug271054300580
Sep51150500521
Oct0038800388
Nov0028800288
Dec0011559071027
Total418782747435133310042