function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 7],
    ['2021', 24],
    ['2019', 13],
    ['2018', 21],
    ['2007', 21],
    ['2005', 62],
    ['1995', 4],
    ['1972', 14],
    ['1956', 14],
    ['1954', 12],
    ['1908', 6],
    ['1870', 3],
    ['1862', 4],
    ['1838', 18],
    ['1753', 23],
    ['Other (14)', 18]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=264)',
    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);