Uncaught Error: google.charts.load() cannot be called more than once

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I want to load multiple charts on every button click event.I have used below google code

<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>

<script type="text/javascript>
        google.charts.load('current', { 'packages': ['corechart'] });
        google.charts.setOnLoadCallback(drawChart);
        function drawChart() {
            var data = google.visualization.arrayToDataTable([
              ['Year', 'Sales', 'Expenses'],
              ['2013', 1000, 400],
              ['2014', 1170, 460],
              ['2015', 660, 1120],
              ['2016', 1030, 540]
            ]);

            var options = {
                title: 'Company Performance',
                hAxis: { title: 'Year', titleTextStyle: { color: '#333' } },
                vAxis: { minValue: 0 }
            };

            var chart = new google.visualization.AreaChart(document.getElementById('chart_div'));
            chart.draw(data, options);
        }
    </script>

but after clicking button it create 1st graph but on other button click in same page another graph is not creating.

If anyone have solution please help.