function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 1346],
    ['2022', 286],
    ['2021', 652],
    ['2020', 508],
    ['2019', 535],
    ['2018', 412],
    ['2017', 1171],
    ['2016', 1399],
    ['2015', 1196],
    ['2014', 529],
    ['2013', 592],
    ['2012', 3529],
    ['2011', 497],
    ['2009', 414],
    ['2007', 207],
    ['Other (136)', 1553]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=14826)',
    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);