function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 1508],
    ['2022', 275],
    ['2021', 695],
    ['2020', 1232],
    ['2019', 779],
    ['2018', 757],
    ['2017', 2615],
    ['2016', 1631],
    ['2015', 703],
    ['2014', 374],
    ['2013', 366],
    ['2012', 349],
    ['2008', 272],
    ['2006', 959],
    ['2005', 1316],
    ['Other (84)', 1320]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=15151)',
    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);