function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2013', 10],
    ['2009', 13],
    ['1985', 23],
    ['1983', 9],
    ['1977', 8],
    ['1976', 13],
    ['1970', 17],
    ['1968', 14],
    ['1963', 8],
    ['1959', 17],
    ['1940', 17],
    ['1938', 9],
    ['1937', 13],
    ['1936', 12],
    ['1934', 7],
    ['Other (87)', 237]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=427)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerYear', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerYear'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerYear);