function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 66],
    ['2022', 54],
    ['2021', 57],
    ['2018', 22],
    ['2015', 3],
    ['2014', 6],
    ['2013', 3],
    ['2012', 7],
    ['2011', 58],
    ['2009', 3],
    ['2007', 32],
    ['1972', 19],
    ['1962', 2],
    ['1956', 20],
    ['1753', 19],
    ['Other (6)', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=379)',
    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);