*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00724159190
Feb0177461143
Mar0511000115
Apr311780092
May134162235004410
Jun15107806910011486
Jul164226460004702
Aug72227000299
Sep2620000208
Oct02930095
Nov00620062
Dec10443665713
Total571921523273188522515