List Authors total posts [code included] need current month

Below is the code that displays authors with a minimum of 20 posts and outputs the posts.

How can I modify it either
1) add a column for monthly posts or
2) same row and add a “,” for posts current month?

//sort users descending by number of posts
$uc=array();
$blogusers = get_users_of_blog();
if ($blogusers) {
  foreach ($blogusers as $bloguser) {
    $post_count = get_usernumposts($bloguser->user_id);
    $uc[$bloguser->user_id]=$post_count;
  }
  arsort($uc);
  foreach ($uc as $key => $value) {
    $user = get_userdata($key);
    $author_posts_url = get_author_posts_url($key);
    $post_count = $value;
if ($post_count > 20 )  echo '<br>';
if ($post_count > 21 )  echo '<a href="' . $author_posts_url .'">' . $user->user_login . '</a> - '  . $post_count .  ' posts';

  }
}
  }