*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0003554557
Feb001481190339
Mar01229500307
Apr0713400141
May04414500486
Jun10145149001510
Jul954241600967
Aug5739800410
Sep0035400354
Oct0041600416
Nov0041800418
Dec0018318521036
Total2424602856515966941