*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0005319324
Feb00114077191
Mar01049500505
Apr1231743001767
May101222837002969
Jun722152543002830
Jul822051600618
Aug21331600340
Sep1238200385
Oct0052400524
Nov0023800238
Dec00900399489
Total1873959798579511180