function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 492],
    ['2022', 130],
    ['2021', 138],
    ['2020', 186],
    ['2019', 78],
    ['2017', 81],
    ['2016', 1089],
    ['2015', 311],
    ['2013', 37],
    ['2012', 94],
    ['2005', 54],
    ['2003', 70],
    ['2001', 48],
    ['1839', 357],
    ['1758', 70],
    ['Other (55)', 381]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=3616)',
    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);