Offtopic: Linux ps aux sort cumulative CPU time

This is a bit offtopic, but a little help would be great.

I am trying to get process with highest cumulative CPU time but ps aux --sort -time| head -n 9 does not work as I expected, I was hoping to see something similar as following (dg4db2AS400C top processes)

ps aux --sort -pcpu | head -n 9

USER        PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
ora11tg   57202 99.4  0.0 148788 20328 ?        Rsl   2019 40364:32
dg4db2AS400XC (LOCAL=NO)
ora11tg  134974 99.4  0.0 148788 20248 ?        Rsl   2019 193192:27
dg4db2AS400XC (LOCAL=NO)
ora11tg  373433 99.4  0.0 148788 20404 ?        Rsl   2019 169730:25
dg4db2AS400XL (LOCAL=NO)
ora11tg   48248 99.3  0.0 148788 20416 ?        Rsl   2019 72485:18
dg4db2AS400XC (LOCAL=NO)
ora11tg  239391 99.3  0.0 148788 20260 ?        Rsl   2019 192392:30
dg4db2AS400XC (LOCAL=NO)
ora11tg  246739 99.3  0.0 148788 20372 ?        Rsl   2019 91992:38
dg4db2AS400XC (LOCAL=NO)
ora11tg  350459 99.3  0.0 148788 20580 ?        Rsl   2019 118145:25
dg4db2AS400XC (LOCAL=NO)
ora11tg  351287 99.3  0.0 148788 20556 ?        Rsl   2019 123978:02

but instead I get this

 ps aux --sort -time| head -n 9

USER        PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root          1  0.9  0.0  19420  2224 ?        Ss    2018 7513:02
/sbin/init
root          2  0.0  0.0      0     0 ?        S     2018   0:25 [kthreadd]
root          3  0.1  0.0      0     0 ?        S     2018 1012:14


[ksoftirqd/0]


root          5  0.0  0.0      0     0 ?        S<    2018   0:00


[kworker/0:0H]


root          8  0.4  0.0      0     0 ?        S     2018 3275:05


[rcu_sched]


root          9  0.0  0.0      0     0 ?        S     2018   0:00 [rcu_bh]
root         10  0.1  0.0      0     0 ?        S     2018 956:02 [rcuos/0]
root         11  0.0  0.0      0     0 ?        S     2018   0:00 [rcuob/0]