I see there's a lot of repetition.

 if ($line =~ /^0.{9}        
(\t[0-9]{1,20}) etc. etc. etc.
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Why not slurp the file into a scalar (Perl Slurp-eaze), split the file at the tabs, and send the data to an array.

my @excelData = split /\t/, $slurpedExcelFile;
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Update - Oops!

As noted out by ikegami the split statement should read:

my @excelData = split "\t", $slurpedExcelFile;
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Update - Aaaaaaaa!

A little testing shows both "/t" and /\t/ will work with split.

If you need to check the individual values create a simpler regex and apply it to each array item.

my @numbers = grep /# your regex/, @excelData;
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Mike