Your conditional doesn't seem to do what you want. What happens if $Age = 0? It takes the final else clause you want to use for oldsters. The example below corrects this problem and IMHO, is easier to read.

if ($Age > 0) {
   if ($Age < 13) {
     # ...
   } elsif ($Age < 18) {
     # ...
   } elsif ($Age < 30) {
     # ...
   } elsif ($Age < 40) {
     # ...
   } elsif ($Age < 60) {
     # ...
   } else {
     # ...
   }
}
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--Jim