Display Sort Order?

Hi, How would I display the sort order in a way similar to displaying categories or tags? Here’s the code I’m using, but only _sft_category and _sft_school display on my page.

$args = array(
	"str" => '<strong>%1$s</strong>: %2$s',
	"show_all_if_empty" => false
	//"field_delim" => '<hr />'
	
);
echo $sf_current_query->get_fields_html(array("_sft_category", "_sft_school", "sort_order"), $args);

Here’s a link to the test page:
http://staging.cudenvertoday.org/articles

Thanks!