Stacked charts with alignment

HTML

<script src="https://canvasjs.com/assets/script/canvasjs.min.js"></script>
<h2>Try hovering over, zooming and panning  charts</h2>
<div id="chartContainer1" style="height: 300px; width: 100%;"></div>
<div id="chartContainer2" style="height: 300px; width: 100%;"></div>

JavaScript

var chart1 = new CanvasJS.Chart("chartContainer1", {
   zoomEnabled: true,
   zoomType: "x", // change it to "xy" to enable zooming on both axes
   title: {
     text: "Chart 1"
   },
   toolTip:{
		shared: true
	},  
   data: [{
     type: "line",
     dataPoints: [
            	  { x: new Date(1992, 0), y: 2500000999 },
                { x: new Date(1993, 0), y: 2798000 },
                { x: new Date(1994, 0), y: 3386000 },
                { x: new Date(1995, 0), y: 6944000 },
                { x: new Date(1996, 0), y: 6026000 },
                { x: new Date(1997, 0), y: 2394000 },
                { x: new Date(1998, 0), y: 1872000 },
                { x: new Date(1999, 0), y: 2140000 },
                { x: new Date(2000, 0), y: 7289000 },
                { x: new Date(2001, 0), y: 4830000999 },
                { x: new Date(2002, 0), y: 2009000 },
                { x: new Date(2003, 0), y: 2840000 },
                { x: new Date(2004, 0), y: 2396000 },
                { x: new Date(2005, 0), y: 1613000 },
                { x: new Date(2006, 0), y: 2821000 }
            ]
   }],
   rangeChanged: syncHandler
 });


 var chart2 = new CanvasJS.Chart("chartContainer2", {
   zoomEnabled: true,
   zoomType: "x",
   title: {
     text: "Chart 2"
   },
   toolTip:{
		shared: true
	},  
   data: [{
     type: "line",
     dataPoints: [
                { x: new Date(1992, 0), y: 20000000000000 },
                { x: new Date(1993, 0), y: 3 },
                { x: new Date(1994, 0), y: 4 },
                { x: new Date(1995, 0), y: 5 },
                { x: new Date(1996, 0), y: 6 },
                { x: new Date(1997, 0), y: 7 },
                { x: new Date(1998, 0), y: 8 },
                { x: new Date(1999, 0), y: 9 },
                { x: new Date(2000, 0), y: 10 },
                { x: new Date(2001, 0), y: 11 },
                { x: new Date(2002, 0), y: 12 },
                { x: new Date(2003, 0), y: 13 },
                { x: new Date(2004, 0), y: 14...