function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 6],
    ['2022', 27],
    ['2021', 2],
    ['2019', 14],
    ['1998', 4],
    ['1995', 40],
    ['1987', 2],
    ['1985', 12],
    ['1975', 1],
    ['1974', 2],
    ['1968', 15],
    ['1954', 1],
    ['1941', 14],
    ['1935', 7],
    ['1886', 1],
    ['Other (5)', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=153)',
    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);