function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 641],
    ['2020', 285],
    ['2019', 524],
    ['2017', 403],
    ['2016', 530],
    ['2015', 326],
    ['2014', 1105],
    ['2013', 246],
    ['2012', 316],
    ['2011', 175],
    ['2010', 210],
    ['2009', 223],
    ['2008', 221],
    ['2006', 151],
    ['1940', 147],
    ['Other (73)', 1161]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=6664)',
    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);