Adding data in a linked list

I just started leaing about linked list and I'm trying to extract certain info from a file and insert it into a linked list using a push function. When I try to view the info to see if it inserted correctly, it just displays the last line of the info over and over. What am I doing wrong? This is my code:

struct Country
 {
  string  name;
  double  population;
 };

struct Node 
 {
  Country ctry;
  Node *next;
 };
Node *world;

void push(Node *&world);

int main ()
{
    push(world);
    retu 0;
}

void push(Node *&world)
{

    ifstream inFile("file.csv");

    if (!inFile.fail())
    {
        cout << "File has opened successfully." << endl;
    }

    if (inFile.fail())
    {
        cout << "File has failed to open." << endl;
        exit(1);
    }

   double temp, temp1, temp2, temp3, population;
   string countryName;
   Node *top = new Node;

   for (int i = 0; i < 300; i++)
    {
        if (inFile.eof())
        {
            top->next = NULL;
            break;
        }

        inFile >> temp >> temp1 >> temp2 >> temp3 >> population;
        getline (inFile,countryName);

        top -> ctry.population = population;
        top -> next = world;
        world = top;

        top -> ctry.name = countryName;
        top -> next = world;
        world = top;
    }

    for (int j = 0; j < 5; j++)
    {
        cout << top -> ctry.name << endl;
        top -> next;
    }
}