*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00011718
Feb00130316
Mar01225400266
Apr12454000565
May42994273003271
Jun146352324006690
Jul1913381225002582
Aug171756600600
Sep0264200644
Oct0011300113
Nov00190019
Dec001106374
Total5510739398018314858