function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 18421],
    ['2022', 17817],
    ['2021', 21264],
    ['2020', 17239],
    ['2019', 15646],
    ['2018', 16826],
    ['2017', 18360],
    ['2016', 23677],
    ['2015', 13976],
    ['2014', 16592],
    ['2013', 14227],
    ['2012', 12118],
    ['2011', 10318],
    ['2010', 9014],
    ['2007', 9010],
    ['Other (255)', 83360]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=317865)',
    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);