function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 2093],
    ['2022', 1413],
    ['2021', 1539],
    ['2020', 1680],
    ['2019', 1349],
    ['2018', 1589],
    ['2017', 1502],
    ['2016', 2723],
    ['2015', 1358],
    ['2014', 1278],
    ['2013', 2828],
    ['2012', 1425],
    ['2011', 1039],
    ['2010', 1255],
    ['2009', 932],
    ['Other (115)', 3871]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=27874)',
    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);