function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2004', 2],
    ['1989', 5],
    ['1978', 5],
    ['1974', 2],
    ['1952', 3],
    ['1949', 3],
    ['1943', 1],
    ['1919', 1],
    ['1917', 1],
    ['1914', 3],
    ['1906', 6],
    ['1903', 1],
    ['1899', 6],
    ['1898', 2],
    ['1891', 1],
    ['Other (6)', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=48)',
    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);