function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 173],
    ['2022', 301],
    ['2021', 130],
    ['2020', 476],
    ['2019', 255],
    ['2018', 201],
    ['2016', 81],
    ['2015', 137],
    ['2014', 167],
    ['2013', 136],
    ['2012', 106],
    ['2009', 72],
    ['2005', 116],
    ['2004', 129],
    ['1933', 96],
    ['Other (36)', 506]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=3082)',
    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);