*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00001616
Feb005038
Mar02190021
Apr1531077001131
May08464214008678
Jun7191702370019414
Jul3140491842005922
Aug23767700707
Sep121563001566
Oct0077300773
Nov01330034
Dec01906777
Total6331749644908638347