*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004910914
Feb003050365670
Mar181111001120
Apr1451848001894
May26591889001974
Jun1471131684001944
Jul180181253001451
Aug7113962001046
Sep15492300942
Oct3062800631
Nov1051400515
Dec00207111081316
Total445260113245238314417