*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0000246246
Feb1087081169
Mar6157100578
Apr081183001191
May31081385001496
Jun23711045001139
Jul19534400368
Aug9125000260
Sep0029800298
Oct0035200352
Nov0027600276
Dec00660260326
Total61194585705876699