*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0007883890
Feb18272981327671
Mar13114765000928
Apr160267603001030
May21650983001249
Jun128981072001298
Jul653769300795
Aug162067700713
Sep81375100772
Oct2148700490
Nov1141400416
Dec01238210441285
Total745662686610225410537