Why my code is only printing the last object?

var students = [
  {
    name: "Vince", 
    track:"Graphic Design", 
    achievements: 5, 
    points: 2508
  },
  {
    name: "Bibi", 
    track:"Smile", 
    achievements: 9, 
    points: 8675
  }, 
  {
    name: "Banana", 
    track:"Sleep", 
    achievements: 4, 
    points: 0909
  },
  {
    name: "Amanda", 
    track:"Make Up", 
    achievements: 7, 
    points: 5453
  },
  {
    name: "Shao", 
    track:"Paint", 
    achievements: 1, 
    points: 7554
  }
];

var message = "";
var student;


function print(message) {
  var outputDiv = document.getElementById("output");
  outputDiv.innerHTML = message;
}


for ( var i = 0; i < students.length; i += 1) {
  student = students[i];
  message = "<h2>Student: " + student.name + "</h2>";
  message += "<p>Track: " + student.track + "</p>";
  message += "<p>Points: " + student.points + "</p>";
  message += "<p>Achievements: " + student.achievements + "</p>";
}
print(message);