*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0005686691
Feb012151301518
Mar3853600547
Apr6757500588
May68001172001978
Jun1743753116007508
Jul1224972544005053
Aug6161167001189
Sep3455800565
Oct4042400428
Nov0031900319
Dec001290658787
Total577708107556164520171