*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00011718
Feb00130316
Mar01225400266
Apr12453900564
May42994269003267
Jun146332323006669
Jul1913381224002581
Aug171756600600
Sep0264200644
Oct0011300113
Nov00190019
Dec001106374
Total5510719397318314831