*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000077
Feb004037
Mar0125900260
Apr132143002147
May4103325003339
Jun2363853003891
Jul4452728002777
Aug222009002013
Sep011959001960
Oct0011300113
Nov005005
Dec00201012
Total13981640002016531