function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2022', 123],
    ['2021', 80],
    ['2020', 180],
    ['2019', 100],
    ['2018', 137],
    ['2017', 1881],
    ['2016', 812],
    ['2014', 134],
    ['2011', 87],
    ['2010', 89],
    ['2009', 94],
    ['2006', 85],
    ['2005', 3533],
    ['1993', 2524],
    ['1982', 2162],
    ['Other (50)', 544]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=12565)',
    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);