the counters in the post table header

Here is how I solved this:

function current_author_count_posts( $acounts, $type, $perm )
{
  if ( 'readable' != $perm || !is_user_logged_in() || current_user_can('administrator') )
    return $acounts;
  $cache_key = _count_posts_cache_key( $type, $perm );
  $counts = wp_cache_get( $cache_key, 'counts_current_author' );
  if ( false === $counts ) {
    global $wpdb;
    $query = $wpdb->prepare( "SELECT post_status, COUNT( * ) AS num_posts FROM {$wpdb->posts} WHERE post_type = %s AND post_author = %d GROUP BY post_status", $type, get_current_user_id() );
    $results = (array) $wpdb->get_results( $query, ARRAY_A );
    $counts = array_fill_keys( get_post_stati(), 0 );
    foreach ( $results as $row )
      $counts[ $row['post_status'] ] = $row['num_posts'];
    $counts = (object) $counts;
    wp_cache_set( $cache_key, $counts, 'counts_current_author' );
    wp_cache_replace( $cache_key, $counts, 'counts' );//replace previously set cache
  }
  return $counts;
}

function display_posts_for_current_author_only($query)
{
  if(!current_user_can('administrator'))
  {
    global $user_ID;
    $query->set('author',  $user_ID);
  }
  return $query;
}

function restrict_admin()
{
  add_action('pre_get_posts', 'display_posts_for_current_author_only');
  add_filter( 'wp_count_posts', 'current_author_count_posts', 0, 3 );
}

add_action( 'admin_init', 'restrict_admin', 1 );

I am not sure it is the best way, since it runs similar query twice, but it seems that there is no a hook to do it efficiently.

Would you update your plugin in this or a similar way?
Thank you very much.

@johnclause thx. Helped me.