function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2022', 4],
    ['1993', 2],
    ['1976', 2],
    ['1962', 2],
    ['1937', 2],
    ['1913', 2],
    ['1905', 3],
    ['1902', 7],
    ['1899', 1],
    ['1898', 1],
    ['1885', 2],
    ['1880', 4],
    ['1877', 2],
    ['1873', 1],
    ['1844', 3],
    ['Other (11)', 11]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=49)',
    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);