public static void Main()
int[] years = { 2013, 2014, 2015 };
int[] population = { 1025632, 1105967, 1148203 };
var sb = new System.Text.StringBuilder();
sb.Append(String.Format("{0,10}\n\n", "Results:"));
sb.Append(String.Format("{0,6} {1,10}\n\n", "Year", "Population"));
for (int index = 0; index < years.Length; index++)
sb.Append(String.Format("{0,6} {1,10:N0}\n", years[index], population[index]));