Multiple Google Charts on same page

HTML

<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>
<div id="resultContainer1"></div>
<div id="resultContainer2"></div>
<div id="resultContainer3"></div>
<div id="resultContainer4"></div>

JavaScript

google.charts.load('41', {
	    packages: ['line']
	});
	google.charts.setOnLoadCallback(drawChart);

	function drawChart() {
	    var data1 = google.visualization.arrayToDataTable([
	        ['TimePeriod', 'Clicks', 'Unsubs', 'ClickOverUnsub'],
	        ['2014-41', 18, 17, 1.0588235294117647],
	        ['2014-42', 39, 19, 2.0526315789473684],
	        ['2014-43', 46, 17, 2.7058823529411765],
	        ['2014-44', 53, 22, 2.4090909090909091],
	        ['2014-45', 29, 15, 1.9333333333333333],
	        ['2014-46', 29, 13, 2.2307692307692308],
	        ['2014-47', 38, 20, 1.9000000000000000],
	        ['2014-48', 83, 5, 16.6000000000000000],
	        ['2014-49', 49, 24, 2.0416666666666667],
	        ['2014-50', 83, 32, 2.5937500000000000],
	        ['2014-51', 8, 2, 4.0000000000000000],
	        ['2014-52', 64, 29, 2.2068965517241379],
	        ['2014-53', 51, 17, 3.0000000000000000],
	        ['2015-01', 100, 47, 2.1276595744680851],
	        ['2015-02', 108, 54, 2.0000000000000000],
	        ['2015-03', 92, 58, 1.5862068965517241],
	        ['2015-04', 54, 65, 0.83076923076923076923],
	        ['2015-05', 124, 41, 3.0243902439024390],
	        ['2015-06', 116, 41, 2.8292682926829268],
	        ['2015-07', 138, 52, 2.6538461538461538],
	        ['2015-08', 128, 51, 2.5098039215686275],
	        ['2015-09', 28, 71, 0.39436619718309859155],
	        ['2015-10', 57, 48, 1.1875000000000000],
	        ['2015-11', 120, 37, 3.2432432432432432],
	        ['2015-12', 257, 53, 4.8490566037735849],
	        ['2015-13', 57, 56, 1.0178571428571429],
	        ['2015-14', 1, 49, 0.02040816326530612245],
	        ['2015-15', 22, 63, 0.34920634920634920635],
	        ['2015-16', 164, 66, 2.4848484848484848],
	        ['2015-17', 118, 55, 2.1454545454545455],
	        ['2015-18', 145, 57, 2.5438596491228070],
	        ['2015-19', 214, 85, 2.5176470588235294],
	        ['2015-20', 128, 80, 1.6000000000000000],
	        ['2015-21', 194, 95, 2.0421052631578947],
	        ['2015-22',...