function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 935],
    ['2022', 404],
    ['2021', 711],
    ['2020', 774],
    ['2019', 484],
    ['2018', 992],
    ['2017', 2300],
    ['2016', 678],
    ['2015', 1395],
    ['2014', 780],
    ['2013', 441],
    ['2012', 781],
    ['2011', 613],
    ['2009', 566],
    ['2006', 278],
    ['Other (115)', 1965]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=14097)',
    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);