I´m trying to create a progress bar while uploading files and importing data in database.

I have created an importer with laravel and ajax with jquery. In this importer I´m reading all data from a CSV file. I´m getting all rows and cols from this file and while I´m reading this file, I´m doing a insert query with eloquent. This is my code:

$fp = fopen($route, 'r');

        // header
        $head = fgetcsv($fp, 4096, ';', '"');
        $header = [];
        
        $header[0] = 'nomape';
        $header[1] = 'direccion';
        $header[2] = 'cp';
        $header[3] = 'ciudad';
        $header[4] = 'provincia';
        $header[5] = 'telefono';
        $header[6] = 'movil';

        $rows = 0;
        $cells = 0;
        
        // Rows
        while($column = fgetcsv($fp, 8192, ';', '"'))
        {
            // build array to can combine header and this array
            $columns = [];
            
            foreach ($column as $val) {
                array_push($columns, $this->delete_accent($val));
            }

            $column = array_combine($header, $columns);
            $result = Listado::insert($column);
            
            if($result){
                $rows++;
            }
            
            $cells++;
        }
        
        fclose($fp);
        return 'Importados un total de: ' .$rows. ' de un total de: ' . $cells;

These operations take time. In my web browser console in network tab, I can show my http petition in pending while importing all my data. My CSV has a 69000 register.

With this code I´m building my progress bar:

$.ajax({    
                    xhr: function() {
                        var xhr = new window.XMLHttpRequest();
                        xhr.upload.addEventListener("progress", function(evt) {
                            if (evt.lengthComputable) {
                                var percentComplete = (evt.loaded / evt.total) * 100;
                                // Place upload progress bar visibility code here
                                console.log(percentComplete);
                            }
                        }, false);
                        return xhr;
                    },          

But this returns 100% value in seconds, when these operations take many minutes. My question is how can I get real progress to create my progress bar ?