*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0005645650
Feb0115361364912
Mar12532241002495
Apr38603732004595
May198879907009805
Jun971413211640015393
Jul7310993658004830
Aug4998200995
Sep1558400590
Oct0041900419
Nov0012200122
Dec00770640717
Total19825248144226164941523