function drawChartTreatmentsPerYear() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['2023', 1603],
    ['2021', 1022],
    ['2020', 1249],
    ['2019', 1177],
    ['2018', 1492],
    ['2016', 1103],
    ['2015', 1551],
    ['2014', 1091],
    ['2013', 1239],
    ['2012', 1860],
    ['2011', 1238],
    ['2009', 1067],
    ['2008', 1461],
    ['2007', 1146],
    ['2006', 1020],
    ['Other (165)', 6636]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Year (n=25955)',
    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);