*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0005649654
Feb0115371368917
Mar12552266002522
Apr18663781004648
May178898970009885
Jun901419712380015525
Jul7111133686004870
Aug49989001002
Sep1558500591
Oct0042000420
Nov0012300123
Dec00770640717
Total18525354146726165741874