function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 500],
    ['2021', 821],
    ['2020', 417],
    ['2019', 413],
    ['2018', 310],
    ['2017', 331],
    ['2016', 1263],
    ['2015', 419],
    ['2014', 248],
    ['2013', 421],
    ['2012', 364],
    ['2010', 329],
    ['2009', 158],
    ['2008', 425],
    ['2004', 284],
    ['Other (97)', 1368]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=8071)',
    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);