Object Collecting & Points on UI

I want to track the collected object's on the UI, so far I managed to do it by changing the public int to static, but when I change the scene the number remains the same. I just want to make a proper reference to the public int score so that it tracks correctly. Thanks!

 using UnityEngine;
 using System.Collections;
 using UnityEngine.UI;
 
 public class Trofeos : MonoBehaviour {
 
 
     public int score;
     Text texto;
     GameObject HUD;
     Animator anim;
     public AudioSource sounds;
     public AudioClip truinfo;
 
     
     void Start(){
         anim = GetComponent<Animator> ();
         sounds = GetComponent<AudioSource>();
         HUD = GameObject.FindGameObjectWithTag ("Trofeos");
         texto = HUD.GetComponentInChildren <Text> ();
         score = 0;
 
     }
 
     void Update(){
 
 
         texto.text = ("Trophies" + score + "/5");
 
 
 
     }
 
 
     void OnTriggerEnter(Collider other)
     {
         if (other.gameObject)
         {
         anim.SetTrigger ("Fade");
         sounds.PlayOneShot(truinfo,1.0F);
         score += 1;
         
     }
 }
 }