function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2024', 5],
    ['2004', 4],
    ['2001', 23],
    ['1973', 4],
    ['1970', 3],
    ['1960', 6],
    ['1957', 3],
    ['1956', 4],
    ['1955', 5],
    ['1950', 3],
    ['1933', 4],
    ['1929', 4],
    ['1924', 3],
    ['1920', 3],
    ['1916', 3],
    ['Other (56)', 81]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=158)',
    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);