Edit in JSFiddle

var data = {
	labels : ["", 20, "", 40, ""],
	datasets : [
		{
			fillColor : "rgba(0,180,255,0.1)",
			strokeColor : "#66ccff",
			pointColor : "#66ccff",
			pointStrokeColor : "#fff",
			data : [65,59,81,56,55,40]
		}
	]
}
var ctx = document.getElementById("myChart").getContext("2d");
new Chart(ctx).Line(data,{
	scaleOverlay : false,
	scaleOverride : true,
	scaleSteps : 3,
	scaleStepWidth : 50,
	scaleStartValue : null,
	scaleLineColor : "#ccc",
	scaleLineWidth : 1,
	scaleShowLabels : true,
	scaleLabel : "<%=value%>",
	scaleFontFamily : "'Arial'",
	scaleFontSize : 11,
	scaleFontStyle : "normal",
	scaleFontColor : "#ccc",	
	scaleShowGridLines : false,
	scaleGridLineColor : "#ccc",
	scaleGridLineWidth : 1,	
	bezierCurve : false,
	pointDot : true,
	pointDotRadius : 6,
	pointDotStrokeWidth : 0,
	datasetStroke : true,
	datasetStrokeWidth : 3,
	datasetFill : true,
	animation : true,
	animationSteps : 60,
	animationEasing : "easeOutQuart",
	onAnimationComplete : null	
});

<div id="chart">
    <canvas id="myChart" width="400" height="200"></canvas>
    <div class="count">
       <em>240,021</em><br>
       <span class="caption">USERS</span>
    </div>
</div>

body {
    background: #fff;
    padding-top: 30px;
}
#chart {
    position: relative;
    width: 400px;
}
#chart .count {
    position: absolute;
    top: 0;
    left:0 ;
    width: 100%;
    text-align: right;
}
#chart em, 
#chart span {
    font-family: Arial;
    width: 100%;
    text-align: center;
}
/* "240,021" */
#chart em {
    font-size: 40px;
    font-weight: bold;
    font-style: normal;
    color: #66ccff;
}
/* "USERS" */
#chart .caption {
    color: #ccc;
    font-size: 12px;
}