*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000000
Feb000000
Mar018009
Apr110131600418
May237064507007594
Jun121198728050020798
Jul7929142386005379
Aug4211255001280
Sep3480200809
Oct00400040
Nov002002
Dec001034
Total2312997761220336333