*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00003838
Feb011101527
Mar00280028
Apr1111992001014
May648642683003395
Jun7241281709002561
Jul12781353069004482
Aug199201061001280
Sep71241700490
Oct3047800481
Nov1018700188
Dec0019082101
Total293536110654013514085