*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004752405287
Feb893717681917583671
Mar583753591004249
Apr9091152448003472
May714712858003643
Jun472912381002944
Jul139352215002389
Aug33111570001614
Sep521209001216
Oct331602001608
Nov221911001915
Dec001113628023921
Total29494422266672980035929