*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00002727
Feb002046
Mar00150015
Apr01650800524
May02273458002731
Jun193241130003390
Jul2215421483003047
Aug241052800562
Sep121600001603
Oct1068100682
Nov00230023
Dec00150113128
Total6770845443014412738