function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 9],
    ['2022', 172],
    ['2020', 10],
    ['2019', 42],
    ['2016', 19],
    ['2015', 111],
    ['2012', 15],
    ['2011', 15],
    ['2010', 17],
    ['2009', 33],
    ['2005', 154],
    ['2004', 10],
    ['2000', 12],
    ['1993', 79],
    ['1982', 88],
    ['Other (23)', 70]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=856)',
    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);