multiple for loops

#!/bin/bash

DISK=`df -h | awk '{print $5}' | sed -e 's/%//'`
DISK2=`df -h | awk '{print $4}' | sed -e 's/%//'`

for percent_2 in $DISK2
do
        size_2[i]=$percent_2
        i=`expr $i+1`
done

for percent in $DISK
do
        size[i]=$percent
        i=`expr $i+1`
done

echo ${size_2[1]}
echo ${size[5]}