*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002126372658
Feb0492969301869
Mar1152111002127
Apr6733306003385
May2146691579006269
Jun65685937470010671
Jul6516604836006561
Aug8332488002529
Sep382639002650
Oct101633001634
Nov001152001152
Dec00648321982849
Total170133212506830576544354