*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan42242000464
Feb1612002030384
Mar0062709285
Apr00936024393
May00256543711050
Jun0042103623803458
Jul0024396443863
Aug0012968305
Sep0014448453
Oct1003761378
Nov2002470249
Dec10247016701198
Total161069108444932449480