*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001010
Feb000011
Mar20110013
Apr5264700654
May5331415001453
Jun131741036001241
Jul722047000562
Aug12350100516
Sep4043700441
Oct1144700449
Nov0015700157
Dec001605167
Total23213351370625564