*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00155763
Feb003501954
Mar10810082
Apr0438800392
May1712064700784
Jun6115948800708
Jul491621800283
Aug7627200285
Sep0127900280
Oct0127500276
Nov0016400164
Dec00300249279
Total135307287853253650