//calculating years worked by mathieu employees

var minutes = 1000*60;
var hours = minutes*60;
var days = hours*24;
var years = days*365;

var date = new Date();
var t = date.getTime();
var thisyear = t/years + 1970;

var yearrounded = Math.floor(thisyear)

var paulstart = 1958;
var pierrestart = 1969;
var marcstart = 1969;
var paulastart = 1985;
var sandrastart = 1987;
var numemployees = 5;

var paulyears = yearrounded - paulstart - 1;
var pierreyears = yearrounded - pierrestart - 1;
var marcyears = yearrounded - marcstart - 1;
var paulayears = yearrounded - paulastart - 1;
var sandrayears = yearrounded - sandrastart - 1;

var totalyears = paulyears + pierreyears + marcyears + paulayears + sandrayears;
var averageyears = Math.floor(totalyears / numemployees);