How to choose option amount record user in laravel?

I'm try to create choose option with 500 users

This my Controller

public function index()
    {
        $request = new \Illuminate\Http\Request();
    
     $employees = Employee::select('name','phone','email','id', DB::raw('2020 - year(day_of_birth) as age'));
     $amount = $request->record; 
     dd($amount);// output is null
     if( $amount == '25') $employees= $employees->paginate(25);
     else if($amount == '50') $employees= $employees->paginate(50);
     else if($amount == '100') $employees= $employees->paginate(100);
     else if($amount == '250') $employees= $employees->paginate(250);
     else $employees= $employees->paginate(500);
     return view('employees.index',['employees'=>$employees]);
    }

This is index.blade.php

...
<div class="clearfix">

        <form class="title_left form-inline row" method="get" action="">
          
...        
</form>
        <div class="custom-select">
          <select name="record" class="custom-select">
            <option value="25" selected="selected">25</option>
            <option value="50">50</option>
            <option value="100">100</option>
            <option value="250">250</option>
            <option value="500">500</option>
            </select>
        </div>
      </div>
...

When i loading route index it's always has 500 users.

via Chebli Mohamed