*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0002556095634
Feb021824421203950
Mar9143852003875
Apr34203805003859
May7412646963008301
Jun66373490730012873
Jul2312195045006287
Aug5133030003048
Sep293202003213
Oct022773002775
Nov002256002256
Dec001255738345096
Total213627743078361156361167