*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan00112830
Feb00140822
Mar01216500177
Apr413648500625
May173827879004723
Jun522456320560026671
Jul303342646004018
Aug101634000366
Sep0428200286
Oct0013600136
Nov00150015
Dec0090171180
Total113319005028120737249