Hide Null Value From Listbox

[haberinyok]

Hello everybody, 

i saw a lot of solution about this topic but ne one doesnt work out for me, i couldnt. 

my listbox at the bottom which has null values under the "KİŞİ SAYISI"

the data came from excell. and there are some null values its ok but i shouldnt see them on my listbox.

what should i do? 

This listbox name is : KPI

fyi.

thanks.

[haberinyok]

God Thanks, 

i appreciate that x 1000000000000

thank you very much.