Nested for loops that print a table of future values

// get the currency and percent formatters
NumberFormat currency = NumberFormat.getCurrencyInstance();
NumberFormat percent = NumberFormat.getPercentInstance();
percent.setMinimumFractionDigits(1);

// set the monthly payment to 100 and display it to the user
double monthlyPayment = 100.0;
System.out.println("Monthly Payment: " + monthlyPayment);
System.out.println();

// declare a variable to store the table
String table  = "       ";

// fill the first row of the table
for (double rate = 5.0; rate < 7.0; rate += .5)
{
    table += percent.format(rate/100) + "         ";
}
table += "\n";

// loop through each row
for (int years = 4; years > 1; years--)
{
    // append the years variable to the start of the row
    String row = years + "    ";
    // loop through each column
    for (double rate = 5.0; rate < 7.0; rate += .5)
    {
        // calculate the future value for each rate
        int months = years * 12;
        double monthlyInterestRate = rate/12/100;
        double futureValue = 0.0;
        for (int i = 1; i <= months; i++)
        {
            futureValue =
                (futureValue + monthlyPayment) *
                (1 + monthlyInterestRate);
        }
        // add the calculation to the row
        row += currency.format(futureValue) + "    ";
    }
    table += row + "\n";
    row = "";
}

// display the table to the user
System.out.println(table);