*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000148599
Feb003201648
Mar1010800109
Apr12112900151
May113587142003740
Jun63126563180013037
Jul266608354006988
Aug151715800190
Sep1616500172
Oct01930094
Nov00400040
Dec00191422442
Total1182289615581552325110