Fix formatting and timing of the output.dat files

[atmyers]

  Day     Never  Infected    Immune    Deaths   Hospitalized     Ventilated       ICU   Exposed   Asymptomatic Presymptomatic   Symptomatic
    0  33981611         5         0         0              0              0         0         5              0              0              0
    1  33981611         5         0         0              0              0         0         5              0              0              0
    2  33981611         5         0         0              0              0         0         3              1              0              1
    3  33981570        46         0         0              0              0         0        40              2              1              3
    4  33981487       129         0         0              0              0         0       111              5              9              4
    5  33981047       569         0         0              0              0         0       525             18             15             11
    6  33980256      1360         0         0              0              0         0      1201             66             36             57
    7  33978723      2893         0         0              0              0         0      2391            196             96            210
    8  33976908      4706         2         0              0              0         0      3521            450            162            573
    9  33972147      9464         5         0              0              0         0      7139            893            247           1185