*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000148296
Feb002612653
Mar05370042
Apr38440055
May72595338002940
Jun10103438960011249
Jul65022873005901
Aug51823200255
Sep0315200155
Oct00520052
Nov00250025
Dec00250442467
Total311799427001555021290