function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2021', 11],
    ['2020', 11],
    ['2014', 7],
    ['2008', 7],
    ['1992', 11],
    ['1966', 11],
    ['1949', 7],
    ['1941', 11],
    ['1932', 6],
    ['1927', 6],
    ['1924', 6],
    ['1916', 33],
    ['1907', 6],
    ['1876', 10],
    ['1854', 52],
    ['Other (84)', 207]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=402)',
    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);