*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002556095634
Feb021824421193949
Mar9143852003875
Apr34203805003859
May7412646962008300
Jun66373490710012871
Jul2312195044006286
Aug5133025003043
Sep293201003212
Oct022772002774
Nov002256002256
Dec001253738335093
Total213627743065361156161152