function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 23],
    ['2019', 42],
    ['2018', 21],
    ['2017', 27],
    ['2016', 79],
    ['2015', 42],
    ['2014', 47],
    ['2013', 137],
    ['2011', 89],
    ['2009', 32],
    ['2008', 43],
    ['2007', 17],
    ['2006', 13],
    ['2003', 52],
    ['1836', 9],
    ['Other (22)', 47]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=720)',
    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);