Re^2: Is there a difference in this declaration? (insignificant)

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#!/usr/bin/perl
use strict;
...
                 Rate     assignment ano_assignment
assignment     99.4/s             --            -8%
no_assignment   108/s             9%             --

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                Rate no_assignment    assignment
no_assignment 96.6/s            --           -3%
assignment    99.4/s            3%            --

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                Rate    assignment no_assignment
assignment    1068/s            --          -37%
no_assignment 1685/s           58%            --

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                    Rate    assignment no_assignment
assignment    11967704/s            --          -49%
no_assignment 23642004/s           98%            --

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