consts.php

<?php

$json = file_get_contents('https://gist.githubusercontent.com/nathggns/051203c3d7e72159de0d/raw/9e368d3a99a219a7fc487d327b86ebd4f6c8ed53/results.json') or die('Cannot fetch data');
$consts = json_decode($json, true) or die('Cannot decode data');

echo array_reduce(array_values($consts), function($amount, $parties) {
	return $amount + ($parties[0]['share'] < 0.5 ? 1 : 0);
}, 0);