*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002015821602
Feb0052846321164
Mar1586500871
Apr01789500912
May91614296001919
Jun401347444001831
Jul252231083001331
Aug751087001099
Sep0098800988
Oct0166500666
Nov0167500676
Dec00397319192319
Total823213792327413315378