*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0005686691
Feb012151301518
Mar3853600547
Apr6757500588
May68011172001979
Jun1743753116007508
Jul1224972545005054
Aug6161168001190
Sep3456100568
Oct4042400428
Nov0031900319
Dec001290658787
Total577709107606164520177