all of the module structure

If you only want to share a variable, the module structure isn't that heavy:

package MyModule;
our $variable = "This variable is visible outside";
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Now with use or require of MyModule, you can access $MyModule::variable. (our actually creates an alias so that $variable points to $MyModule::variable inside the MyModule.pm file).

Otherwise, if your file only contains the data, and no definition, for example:

# data.pl
{
  Stuff => 1
}
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You can use do like this: my $data = do "./data.pl"; (ie, the definition of the variable in the calling script, that way each script using the data can define its own name).

Edit: "./data.pl" is better than "data.pl" because do searches in the folders of @INC, which does not contain the current one by default in perl >= v5.26