*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002519331958
Feb1272577881523
Mar481217001229
Apr3161090001109
May105679172005861
Jun59134293490013837
Jul3945112602007152
Aug14292092002135
Sep161750001757
Oct001255001255
Nov0184400845
Dec00449218222273
Total131236811254534454340934