function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 57],
    ['2021', 502],
    ['2020', 77],
    ['2019', 173],
    ['2018', 58],
    ['2016', 133],
    ['2014', 212],
    ['2013', 322],
    ['2012', 103],
    ['2011', 49],
    ['2010', 65],
    ['2008', 49],
    ['2007', 130],
    ['2006', 60],
    ['2005', 39],
    ['Other (169)', 776]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=2805)',
    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);