function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2022', 7],
    ['2021', 15],
    ['2020', 7],
    ['1882', 7],
    ['1876', 4],
    ['1870', 4],
    ['1862', 4],
    ['1861', 6],
    ['1860', 14],
    ['1859', 8],
    ['1851', 4],
    ['1836', 4],
    ['1792', 12],
    ['1766', 4],
    ['1758', 29],
    ['Other (71)', 112]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=241)',
    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);