*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001465466
Feb021630278443
Mar0458700591
Apr2456700573
May23552500553
Jun362436700427
Jul46624600298
Aug30424500279
Sep84137700462
Oct1027500276
Nov4040200406
Dec001080370478
Total226503862111135252