*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000148296
Feb002612653
Mar05370042
Apr38440055
May72594335002936
Jun10103368940011240
Jul65021873005900
Aug51822600249
Sep0315200155
Oct00520052
Nov00250025
Dec00250442467
Total311798526891555021270