Not sure what kind of record the task is asking for but here it is. Any way I can improve this?

var students = [ 

  { 
  name: 'Ben',           //Name with string value
  track: 'Javascript Full Stack',          //eg. iOS, Web Design, Front End Development, Etc.
  achievements: 6,   // Should hold a number value.
  points: 3005,         //holds number of points student has earned
  }, 

 { 
  name: 'Danny',        
  track: 'Python for Data Analysis',          
  achievements: '3',   
  points: 118,                 
  },

  { 
  name: 'Hasanda',          
  track: 'Frontend Development',          
  achievements: 30,   
  points: 30000,                
  }, 

  { 
  name: 'Tony',           
  track: 'Backend Development',          
  achievements: 40,  
  points: 40000,                    
  }, 

  { 
  name: 'Luke',           
  track: 'Java Backend Development',          
  achievements: 40,   
  points: 40000,                      
  } 

];

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

function capitalizeFirstLetter(string) {
    return string.charAt(0).toUpperCase() + string.slice(1);
}

var studentList = "<h1>Here is a list of students: </h1> <ol>";

for(i = 0; i < students.length; i += 1) {
  studentList += "<li>";
for (var key in students[i]) {
  studentList += capitalizeFirstLetter(key) + ": " + students[i][key] + "<br>";
  }                  
  studentList += "</li>";
}  

studentList += "</ol>"+ "<br>";

print(studentList);