function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 547],
    ['2022', 524],
    ['2021', 609],
    ['2020', 768],
    ['2019', 645],
    ['2018', 878],
    ['2016', 585],
    ['2015', 767],
    ['2013', 538],
    ['2012', 1208],
    ['2011', 718],
    ['2010', 678],
    ['2008', 1157],
    ['2007', 671],
    ['2006', 581],
    ['Other (128)', 3119]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=13993)',
    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);