*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001638639
Feb0756514411014
Mar1612442002504
Apr21204574004696
May14102229390011175
Jun891630711840017580
Jul7518213976005872
Aug591395001409
Sep0487100875
Oct0060300603
Nov0016700167
Dec001030700803
Total18628551168192177947337