your text editor is set to use 4 columns for tabs. you will have to use spaces instead. printf is one way:

my @data = (
    [qw( Count 0 0 0 0 3 0 )],
    [qw( Percent 0 0 0 0 75 0 )]
);

my @headers = qw(Range 10-20 20-30 30-40 41-50 51-60 61-70);
printf "%-10s %7s %7s %7s %7s %7s %7s\n", @headers;

foreach my $values ( @data ) {
    printf "%-10s %7d %7d %7d %7d %7d %7d\n", @$values;
}
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produces:

Range        10-20   20-30   30-40   41-50   51-60   61-70
Count            0       0       0       0       3       0
Percent          0       0       0       0      75       0