*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00002323
Feb002057
Mar00130013
Apr17730081
May7526482001015
Jun4042501023005313
Jul29629350001008
Aug3618100190
Sep2813700147
Oct00240024
Nov000000
Dec0080190198
Total825426229302188019