function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 75],
    ['2022', 82],
    ['2021', 53],
    ['2020', 28],
    ['2018', 80],
    ['2017', 102],
    ['2016', 18],
    ['2014', 37],
    ['2013', 10],
    ['2011', 13],
    ['2007', 49],
    ['1972', 28],
    ['1956', 26],
    ['1952', 6],
    ['1924', 4],
    ['Other (12)', 22]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=633)',
    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);