function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 21],
    ['2022', 31],
    ['2021', 61],
    ['2018', 45],
    ['2014', 27],
    ['2008', 6],
    ['2007', 56],
    ['2002', 5],
    ['1976', 47],
    ['1964', 11],
    ['1956', 22],
    ['1929', 2],
    ['1916', 8],
    ['1909', 2],
    ['1753', 37],
    ['Other (11)', 15]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=396)',
    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);