function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 39503],
    ['2022', 31038],
    ['2021', 40814],
    ['2020', 40521],
    ['2019', 32273],
    ['2018', 34238],
    ['2017', 37855],
    ['2016', 53694],
    ['2015', 30784],
    ['2014', 35058],
    ['2013', 30715],
    ['2012', 27971],
    ['2011', 22294],
    ['2010', 20010],
    ['2009', 18066],
    ['Other (248)', 116398]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=611232)',
    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);