*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00011819
Feb00130316
Mar01225700269
Apr12454200567
May42994273003271
Jun146352325006691
Jul1913381226002583
Aug171756700601
Sep0264200644
Oct0011300113
Nov00190019
Dec001106374
Total5510739398818414867