*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan15424000178
Feb5941790143
Mar003992104
Apr00271578
May00317128443018
Jun002046577758260
Jul001643032013647
Aug00220125228
Sep0002057212
Oct00086086
Nov00073073
Dec71230520767
Total925314719321385916794