function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 159],
    ['2022', 140],
    ['2021', 292],
    ['2020', 74],
    ['2019', 37],
    ['2018', 175],
    ['2017', 34],
    ['2016', 157],
    ['2014', 240],
    ['2013', 24],
    ['2009', 15],
    ['2007', 148],
    ['1972', 175],
    ['1956', 170],
    ['1753', 52],
    ['Other (38)', 93]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=1985)',
    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);