*Excludes Observations that span multiple months

  B
b
t
W
w
 
Jan0001105106
Feb005013687
Mar08860094
Apr1259300119
May22611900147
Jun518821000403
Jul3169300112
Aug02900092
Sep0011900119
Oct0010100101
Nov00630063
Dec00380237275
Total11265106223781718