*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000011
Feb012014
Mar113580072
Apr222741789002085
May345813080003506
Jun4131463262003821
Jul830473190004067
Aug196322730002958
Sep36131411001460
Oct3016500168
Nov00160016
Dec003047
Total2056397157060618165