function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2008', 3],
    ['2006', 2],
    ['1990', 2],
    ['1971', 9],
    ['1920', 5],
    ['1919', 2],
    ['1917', 2],
    ['1906', 2],
    ['1902', 3],
    ['1899', 4],
    ['1898', 2],
    ['1896', 2],
    ['1895', 3],
    ['1893', 2],
    ['1889', 2],
    ['Other (27)', 28]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=73)',
    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);