function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2021', 299],
    ['2020', 168],
    ['2019', 211],
    ['2018', 193],
    ['2017', 214],
    ['2016', 1025],
    ['2015', 236],
    ['2014', 87],
    ['2013', 163],
    ['2012', 122],
    ['2011', 81],
    ['2010', 178],
    ['2008', 74],
    ['2007', 109],
    ['2005', 87],
    ['Other (32)', 399]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=3646)',
    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);