function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2021', 55],
    ['2020', 64],
    ['2019', 75],
    ['2018', 106],
    ['2017', 92],
    ['2016', 34],
    ['2014', 72],
    ['2013', 32],
    ['2012', 34],
    ['2009', 343],
    ['2005', 1025],
    ['1993', 432],
    ['1982', 391],
    ['1914', 29],
    ['1758', 53],
    ['Other (76)', 335]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=3172)',
    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);