function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 74],
    ['2021', 196],
    ['2020', 109],
    ['2019', 1496],
    ['2017', 548],
    ['2016', 152],
    ['2015', 85],
    ['2014', 97],
    ['2013', 129],
    ['2010', 84],
    ['2008', 215],
    ['2005', 2239],
    ['1998', 102],
    ['1993', 1110],
    ['1982', 1111],
    ['Other (38)', 567]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=8314)',
    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);