*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002331723195
Feb231133511192262
Mar6303510003546
Apr181185533005669
May1193328367008818
Jun2984506923007671
Jul293432141002477
Aug62102112002184
Sep891896001913
Oct011791001792
Nov011553001554
Dec00700525703275
Total8069973565933686144356