*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002331733196
Feb231133511192262
Mar6303509003545
Apr181185541005677
May1193358373008827
Jun2984506934007682
Jul293432146002482
Aug62102131002203
Sep891908001925
Oct011799001800
Nov011566001567
Dec00701525713277
Total80610003574133686344443