function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2022', 26],
    ['2021', 65],
    ['2019', 30],
    ['2015', 10],
    ['2014', 75],
    ['1981', 9],
    ['1978', 5],
    ['1971', 7],
    ['1963', 5],
    ['1939', 6],
    ['1934', 8],
    ['1932', 13],
    ['1928', 23],
    ['1904', 5],
    ['1896', 6],
    ['Other (60)', 118]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=411)',
    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);