function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 425],
    ['2022', 587],
    ['2021', 1321],
    ['2020', 268],
    ['2019', 293],
    ['2018', 360],
    ['2017', 235],
    ['2016', 388],
    ['2015', 442],
    ['2014', 502],
    ['2013', 950],
    ['2012', 329],
    ['2011', 405],
    ['2010', 1073],
    ['2009', 633],
    ['Other (57)', 1071]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=9282)',
    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);