function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 271],
    ['2022', 78],
    ['2021', 100],
    ['2020', 685],
    ['2019', 151],
    ['2017', 70],
    ['2016', 60],
    ['2015', 61],
    ['2013', 118],
    ['2012', 106],
    ['2011', 82],
    ['2010', 74],
    ['2009', 170],
    ['2008', 52],
    ['2003', 54],
    ['Other (34)', 301]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=2433)',
    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);