function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 338],
    ['2022', 158],
    ['2021', 256],
    ['2020', 239],
    ['2019', 195],
    ['2018', 435],
    ['2017', 152],
    ['2016', 197],
    ['2015', 138],
    ['2014', 383],
    ['2013', 253],
    ['2012', 175],
    ['2011', 170],
    ['2009', 108],
    ['2007', 108],
    ['Other (65)', 508]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=3813)',
    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);