function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 15],
    ['2021', 36],
    ['2020', 30],
    ['2018', 40],
    ['2017', 32],
    ['2016', 48],
    ['2015', 29],
    ['2014', 30],
    ['2011', 377],
    ['2010', 14],
    ['2009', 21],
    ['2005', 558],
    ['1993', 308],
    ['1982', 273],
    ['1758', 53],
    ['Other (42)', 175]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=2039)',
    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);