*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001719091926
Feb0268726811372
Mar0212191002212
Apr0261760001786
May186269300773
Jun832050400607
Jul80747000557
Aug18234300363
Sep1022900230
Oct0023800238
Nov0083500835
Dec00454017672221
Total200140840419435713120