*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002404406
Feb001481123272
Mar0765100658
Apr0171619001636
May21111391001504
Jun66174100808
Jul30526900304
Aug8119600205
Sep1027600277
Oct0045600456
Nov0032800328
Dec00910316407
Total47202616638437261