Can a csv be a drupal template with a parameter?

outputCSV.tpl.php

<?php
echo "year = " . $year;
header("Content-Type: text/csv"); 
header("Content-Disposition: attachment; filename=file.csv"); // Disable caching 
header("Cache-Control: no-cache, no-store, must-revalidate"); // HTTP 1.1 
header("Pragma: no-cache"); // HTTP 1.0 
header("Expires: 0"); // Proxies


$objects = re_dashboard_sendCSV($year);

return toCSV($objects);

?>

re_dashboard.module.php

unction re_dashboard_menu() {
  $items = array();
  $items['redashboardlogin'] = array('page callback' => 'drupal_get_form',
        'page arguments' => array('re_dashboard_login_form'),
        'access callback' => true
    );
  $items['redashboard/toCSV/%'] = array(
    'title' => "Projects output",
    'page arguments' => array(2),
    'page callback' => '_re_dashboard_projects_toCSV',
    'access arguments' => 'access content',
    'access callback' => TRUE,
    'type' => MENU_NORMAL_ITEM,
    'file' => 're_dashboard_helper.inc',
    );
  return $items;
}

function re_dashboard_theme() {
  return array(
    're_dashboard_my_project_page' => array(
        'template' => 'project_page',
        'path' => drupal_get_path('module', 're_dashboard'),
        'type' => 'module',
        'variables' => array('results' => NULL,)
      ),
    're_dashboard_csv' => array(
      'template' => 'outputCSV',
      'path' => drupal_get_path('module', 're_dashboard'),
      'type' => 'module',
      'variables' => array('results' => NULL,)
    ),
    );
}

unction re_dashboard_all_list() {
  re_dashboard_login_check();

  dpm($_SESSION);
  $table = array(
    'header' => array(
      'default' => array('data' => t("Year"), 'field' => 'expectedCompletionYear', 'sort' => 'asc'),
      array('data' => t('Resident Name/Investigator'), 'field' => ''),
      array('data' => t("Project Name/Question"), 'field' => 'projectName'),
      array('data' => t('Mentor/Principal'), 'field' => 'projectMentor'),
      ),
      'rows' => array(),
      'attributes' => array('id' => 'redashboard-table', 'align' => 'center')
    );
  $no_yes = array("No", "Yes");
  $query = db_select('domResidents', 'r');
  $query->join('domProjects', 'p', 'r.residentID = p.residentID');
  $query->fields('r', array('firstName', 'lastName', 'expectedCompletionYear'))
  ->fields('p', array('projectName', 'projectMentor', 'domProjectID', 'projectStatus'))
  ->orderBy('r.expectedCompletionYear', 'ASC')
  ->orderBy('r.lastName', 'ASC');
  // ->extend('TableSort')
//  ->orderBy('r.expectedCompletionYear');
//  $query->groupBy('r.expectedCompletionYear');

  $arr = array();
  $result = $query->execute()->fetchAll();
  //print_r($result);
$years = array();
$header = array('Name' => t('Resident Name/Investigator'), 'projectName' =>  t("Project Name/Question"), 'projectStatus' => t('Status'),'projectMentor' => t('Mentor/Principal'));

  foreach ($result as $item) {

$rows[$item->expectedCompletionYear][] = array('Name' => $item->lastName . ', ' . $item->firstName , l($item->projectName, 'redashboard/project/' . $item->domProjectID), $item->projectStatus, 'projectMentor' => $item->projectMentor);
    $years[] = $item->expectedCompletionYear;

  }
$my_years = array_unique($years);  
$theme = '';
foreach($my_years as $key => $value){
  $theme .=  '<h2>'. $value.' Residents</h2>'; 
  $theme .= theme('table',array('header' => $header,'rows' => $rows[$value]));
  $theme .= '<br>';
  if (isset($_SESSION['isadmin']) && $_SESSION['isadmin']) {
    $theme .= l('Download ' . $value . ' projects', 'redashboard/toCSV/' . $value) .'<br>';
  }
}
  $theme .= l('Back to Residents Dashboard', 'redashboard');
return $theme;

}

re_dashboard_helper.inc.php

function re_dashboard_sendCSV($year) {
  $query = db_select('domResidents', 'r');
  $query->join('domProjects', 'p', 'r.residentID = p.residentID');
  $query->fields('r', array('firstName', 'lastName', 'expectedCompletionYear'))
  ->condition('expectedCompletionYear', $year, '=')
  ->fields('p', array('projectName', 'projectMentor', 'domProjectID', 'projectStatus'))
  ->orderBy('r.expectedCompletionYear', 'ASC')
  ->orderBy('r.lastName', 'ASC');
  $result = $query->execute()->fetchAll();
  return $result;
}

function toCSV($objects) {
  $delimiter = ", ";
  if (count($objects) > 0) {
    $output = fopen("php://output", "w");
    $header = array_keys((array)$objects[0]);
    fputcsv($output, $header, $delimiter);
    foreach ($objects as $element) {
      fputcsv($output, (array)$element, $delimiter);
    }
  }
}

function _re_dashboard_projects_toCSV($year) {
  $output = array();
  return theme('re_dashboard_csv', array('year' =>$year));
}