*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002519191944
Feb1265777851452
Mar481195001207
Apr3161070001089
May105677173005860
Jun59134873490013895
Jul3945422561007142
Aug14292064002107
Sep161720001727
Oct001230001230
Nov0181100812
Dec00441218192262
Total131237681227134452340727