*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002519321957
Feb1272577881523
Mar481216001228
Apr3161090001109
May105679171005860
Jun59134293480013836
Jul3945112601007151
Aug14292088002131
Sep161747001754
Oct001253001253
Nov0184000841
Dec00447218192268
Total131236811252634453940911