function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 98],
    ['2022', 238],
    ['2021', 520],
    ['2020', 114],
    ['2018', 197],
    ['2016', 26],
    ['2014', 131],
    ['2013', 17],
    ['2012', 54],
    ['2007', 230],
    ['2006', 13],
    ['1976', 236],
    ['1968', 63],
    ['1956', 276],
    ['1753', 156],
    ['Other (28)', 108]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=2477)',
    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);