docs: public void writeFinalResults() {
  		printStatus();
  
  		try (PrintStream out = new PrintStream(
  				ExampleHelpers
  						.openExampleFileOuputStream("life-expectancies.csv"))) {
  
  			for (int i = 0; i < lifeSpans.length; i++) {
  				if (peopleCount[i] != 0) {
  					out.println(i + "," + (double) lifeSpans[i]
  							/ peopleCount[i] + "," + peopleCount[i]);
  				}
  			}
  		} catch (IOException e) {
  			e.printStackTrace();
  		}
  	}