*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0004910914
Feb003060365671
Mar181113001122
Apr1451855001901
May26591891001976
Jun1471131684001944
Jul180181254001452
Aug7113962001046
Sep15492400943
Oct3062800631
Nov1051400515
Dec00207111081316
Total445260113385238314431