function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 45],
    ['2021', 36],
    ['2020', 18],
    ['2019', 10],
    ['2018', 10],
    ['2017', 6],
    ['2008', 26],
    ['2005', 61],
    ['1980', 6],
    ['1967', 6],
    ['1926', 7],
    ['1924', 17],
    ['1916', 7],
    ['1913', 11],
    ['1895', 8],
    ['Other (99)', 217]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=491)',
    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);