function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 603],
    ['2022', 648],
    ['2021', 908],
    ['2020', 124],
    ['2019', 32],
    ['2018', 491],
    ['2017', 81],
    ['2016', 178],
    ['2015', 46],
    ['2014', 331],
    ['2013', 133],
    ['2012', 87],
    ['2011', 44],
    ['2007', 1178],
    ['1976', 498],
    ['Other (59)', 277]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=5659)',
    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);