*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00016770786
Feb012100240451
Mar02778100808
Apr5632109002177
May17862771002874
Jun222863412003720
Jul19681449001536
Aug881046001062
Sep261274001282
Oct0284600848
Nov0045300453
Dec0022929441175
Total735471458018195417172