Is there any way to display total views of all posts of one category? How to show that number on archive page? I have used this code to count views of each post:

function getPostViews($postID){
    $count_key ='post_views_count';
    $count = get_post_meta($postID, $count_key,true);
    if($count=='' || $count < 0){
        delete_post_meta($postID, $count_key);
        add_post_meta($postID, $count_key,'0');
        return"0 Views";
    }
    return $count.' Views';}function setPostViews($postID){
    $count_key ='post_views_count';
    $count = get_post_meta($postID, $count_key,true);
    if($count=='' || $count < 0){
        $count =0;
        delete_post_meta($postID, $count_key);
        add_post_meta($postID, $count_key,'0');
    }else{
        $count = $count + 1;
        update_post_meta($postID, $count_key, $count);
    }
  }

But how to count total views for one category and display it? Please help me!