*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004748734920
Feb021746416493401
Mar15183518003551
Apr35193514003568
May7112526017007340
Jun50373574300011215
Jul2012194103005342
Aug3142175002192
Sep0102266002276
Oct022065002067
Nov001683001683
Dec00879727173603
Total19462713539658923951158