function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 9],
    ['2022', 8],
    ['2021', 23],
    ['2019', 32],
    ['2016', 3],
    ['2014', 7],
    ['2010', 5],
    ['2007', 12],
    ['2003', 3],
    ['1938', 6],
    ['1882', 2],
    ['1871', 3],
    ['1863', 6],
    ['1823', 2],
    ['1810', 13],
    ['Other (20)', 23]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=157)',
    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);