*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0003138173848
Feb071187614872687
Mar9262505002540
Apr7752509002591
May204973391005384
Jun707061372007503
Jul4918552703004607
Aug9292623002661
Sep162370002377
Oct011822001823
Nov031458001461
Dec00791833274126
Total165140361873145863141608