*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan58101060
Feb160023039
Mar00092799
Apr00027910289
May006583104693
Jun00478031821032
Jul005317118242
Aug008953106
Sep0011002103
Oct0001340134
Nov00065065
Dec21600280244
Total290111523743263106