*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0003213216
Feb0061041102
Mar11061325001432
Apr153762194002585
May614188811005060
Jun14053822748008270
Jul693912561003021
Aug14191447001480
Sep2494400950
Oct1030500306
Nov00990099
Dec00671552620
Total3031046612562480624141