*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0003665366572
Feb0421672222954488
Mar9244138004171
Apr16444075004135
May493636834007246
Jun106239777780010281
Jul424543908004404
Aug392812002824
Sep093681003690
Oct013794003795
Nov002918002918
Dec011597646736277
Total225330643702641350460801