*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00155763
Feb003501954
Mar10810082
Apr0439100395
May1712065600793
Jun6215949400715
Jul491621800283
Aug7627700290
Sep0127900280
Oct0127500276
Nov0016400164
Dec00300249279
Total136307290153253674