function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 7],
    ['2005', 6],
    ['2000', 7],
    ['1990', 5],
    ['1945', 7],
    ['1937', 4],
    ['1934', 4],
    ['1931', 6],
    ['1921', 10],
    ['1865', 5],
    ['1846', 8],
    ['1839', 22],
    ['1837', 5],
    ['1822', 49],
    ['1758', 31],
    ['Other (104)', 158]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=334)',
    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);