List<string> listYears = new List<string>();

listYears = (List<string>)window.ExecuteScript(@"$(document).ready(function(){
 var scr = document.createElement('script');
 scr.src = 'https://code.jquery.com/jquery-3.3.1.js';
 document.body.appendChild(scr);

 var years = []
 var thisYear = 0;

 $('time').each(function(){
   thisYear = parseInt($(this).attr('datetime').split('-')[0]);
        years.push(thisYear);
 });

    return years.toString();
});");

System.Diagnostics.Debug.WriteLine("*************************");
System.Diagnostics.Debug.WriteLine("*************************");
System.Diagnostics.Debug.WriteLine("*************************");
System.Diagnostics.Debug.WriteLine("listYears: " + listYears[0]);
System.Diagnostics.Debug.WriteLine("*************************");
System.Diagnostics.Debug.WriteLine("*************************");
System.Diagnostics.Debug.WriteLine("*************************");

System.Diagnostics.Debug.WriteLine("*************************");
System.Diagnostics.Debug.WriteLine("*************************");
System.Diagnostics.Debug.WriteLine("*************************");
System.Diagnostics.Debug.WriteLine("listYears: " + listYears);
System.Diagnostics.Debug.WriteLine("*************************");
System.Diagnostics.Debug.WriteLine("*************************");
System.Diagnostics.Debug.WriteLine("*************************");