*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001919041923
Feb02578177401337
Mar021907001909
Apr11252474002510
May234043791004218
Jun3118954300006226
Jul254642860003349
Aug1021964001976
Sep021664001666
Oct001415001415
Nov0065300653
Dec11406315251936
Total10127972201239416929118