function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 65],
    ['2022', 133],
    ['2021', 261],
    ['2018', 128],
    ['2017', 42],
    ['2016', 17],
    ['2014', 31],
    ['2013', 17],
    ['2008', 20],
    ['2007', 261],
    ['1976', 167],
    ['1956', 55],
    ['1920', 30],
    ['1878', 18],
    ['1753', 187],
    ['Other (42)', 161]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=1593)',
    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);