Array
(
    [1-20] => 

                    1% to 20%
                 
    [21-40] => 

                    21% to 40%
                 
    [41-60] => 

                    41% to 60%
                 
    [61-80] => 

                    61% to 80%
                 
    [81-100] => 

                    81% to 100%
                 
)