*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan000033
Feb001001
Mar01100011
Apr05115000201
May31411218001632
Jun173074121003212
Jul2911171100002246
Aug12541300430
Sep1374200746
Oct1117500177
Nov006006
Dec00011516
Total63566329361188681