function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 28979],
    ['2022', 23428],
    ['2021', 27637],
    ['2020', 31643],
    ['2019', 24324],
    ['2018', 25386],
    ['2017', 28069],
    ['2016', 43400],
    ['2015', 23050],
    ['2014', 28011],
    ['2013', 21259],
    ['2012', 18515],
    ['2011', 16629],
    ['2010', 14932],
    ['2009', 12958],
    ['Other (247)', 82822]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=451042)',
    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);