function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2021', 81],
    ['2019', 91],
    ['2018', 76],
    ['2016', 121],
    ['2012', 64],
    ['2010', 51],
    ['2009', 60],
    ['2008', 127],
    ['2007', 79],
    ['2006', 137],
    ['2005', 74],
    ['2003', 112],
    ['2002', 81],
    ['2001', 144],
    ['1886', 51],
    ['Other (77)', 554]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=1903)',
    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);