function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['1985', 4],
    ['1975', 2],
    ['1974', 2],
    ['1970', 2],
    ['1969', 3],
    ['1968', 3],
    ['1952', 2],
    ['1948', 3],
    ['1943', 2],
    ['1940', 2],
    ['1938', 2],
    ['1937', 6],
    ['1936', 5],
    ['1930', 2],
    ['1928', 3],
    ['Other (16)', 19]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=62)',
    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);