*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002519321957
Feb1272577881523
Mar481217001229
Apr3161090001109
May105679172005861
Jun59134293480013836
Jul3945112602007152
Aug14292089002132
Sep161747001754
Oct001254001254
Nov0184000841
Dec00448218192269
Total131236811253234453940917